./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fd523f7f98069bc15a8892c75be26f15a858863c31fc6ea863dcd5f92e46c458 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 09:06:10,770 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 09:06:10,771 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 09:06:10,796 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 09:06:10,796 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 09:06:10,797 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 09:06:10,801 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 09:06:10,804 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 09:06:10,805 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 09:06:10,808 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 09:06:10,809 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 09:06:10,811 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 09:06:10,811 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 09:06:10,813 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 09:06:10,814 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 09:06:10,817 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 09:06:10,818 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 09:06:10,819 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 09:06:10,821 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 09:06:10,826 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 09:06:10,827 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 09:06:10,828 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 09:06:10,829 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 09:06:10,829 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 09:06:10,830 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 09:06:10,835 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 09:06:10,836 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 09:06:10,836 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 09:06:10,837 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 09:06:10,837 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 09:06:10,838 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 09:06:10,838 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 09:06:10,839 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 09:06:10,840 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 09:06:10,841 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 09:06:10,841 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 09:06:10,841 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 09:06:10,842 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 09:06:10,842 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 09:06:10,842 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 09:06:10,843 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 09:06:10,844 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 09:06:10,850 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 09:06:10,872 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 09:06:10,873 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 09:06:10,873 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 09:06:10,873 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 09:06:10,874 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 09:06:10,874 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 09:06:10,875 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 09:06:10,875 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 09:06:10,875 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 09:06:10,876 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 09:06:10,876 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 09:06:10,876 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 09:06:10,876 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 09:06:10,876 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 09:06:10,876 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 09:06:10,885 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 09:06:10,885 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 09:06:10,885 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 09:06:10,886 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 09:06:10,886 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 09:06:10,886 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 09:06:10,886 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 09:06:10,886 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 09:06:10,887 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 09:06:10,887 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 09:06:10,887 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 09:06:10,887 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 09:06:10,887 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 09:06:10,888 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 09:06:10,888 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 09:06:10,888 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 09:06:10,888 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 09:06:10,888 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 09:06:10,889 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fd523f7f98069bc15a8892c75be26f15a858863c31fc6ea863dcd5f92e46c458 [2022-07-21 09:06:11,185 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 09:06:11,201 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 09:06:11,203 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 09:06:11,204 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 09:06:11,205 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 09:06:11,206 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c [2022-07-21 09:06:11,252 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed57739bf/ad537bb68e4d44878dffc30a7a6a3eca/FLAG189f8541a [2022-07-21 09:06:11,599 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 09:06:11,599 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c [2022-07-21 09:06:11,606 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed57739bf/ad537bb68e4d44878dffc30a7a6a3eca/FLAG189f8541a [2022-07-21 09:06:12,049 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed57739bf/ad537bb68e4d44878dffc30a7a6a3eca [2022-07-21 09:06:12,051 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 09:06:12,052 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 09:06:12,053 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 09:06:12,053 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 09:06:12,055 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 09:06:12,056 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:06:12" (1/1) ... [2022-07-21 09:06:12,057 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ad662c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:06:12, skipping insertion in model container [2022-07-21 09:06:12,057 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:06:12" (1/1) ... [2022-07-21 09:06:12,062 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 09:06:12,071 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 09:06:12,193 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c[2087,2100] [2022-07-21 09:06:12,195 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 09:06:12,206 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 09:06:12,241 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c[2087,2100] [2022-07-21 09:06:12,245 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 09:06:12,254 INFO L208 MainTranslator]: Completed translation [2022-07-21 09:06:12,255 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:06:12 WrapperNode [2022-07-21 09:06:12,255 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 09:06:12,256 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 09:06:12,256 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 09:06:12,256 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 09:06:12,260 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:06:12" (1/1) ... [2022-07-21 09:06:12,266 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:06:12" (1/1) ... [2022-07-21 09:06:12,284 INFO L137 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 76 [2022-07-21 09:06:12,285 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 09:06:12,286 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 09:06:12,286 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 09:06:12,286 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 09:06:12,292 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:06:12" (1/1) ... [2022-07-21 09:06:12,292 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:06:12" (1/1) ... [2022-07-21 09:06:12,300 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:06:12" (1/1) ... [2022-07-21 09:06:12,301 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:06:12" (1/1) ... [2022-07-21 09:06:12,310 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:06:12" (1/1) ... [2022-07-21 09:06:12,314 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:06:12" (1/1) ... [2022-07-21 09:06:12,316 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:06:12" (1/1) ... [2022-07-21 09:06:12,320 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 09:06:12,321 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 09:06:12,322 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 09:06:12,322 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 09:06:12,322 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:06:12" (1/1) ... [2022-07-21 09:06:12,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 09:06:12,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:06:12,357 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-21 09:06:12,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-21 09:06:12,402 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 09:06:12,402 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-21 09:06:12,403 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-21 09:06:12,403 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-21 09:06:12,403 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-21 09:06:12,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 09:06:12,403 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 09:06:12,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 09:06:12,404 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-21 09:06:12,404 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-21 09:06:12,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 09:06:12,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 09:06:12,404 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 09:06:12,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 09:06:12,405 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-21 09:06:12,481 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 09:06:12,483 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 09:06:12,597 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 09:06:12,660 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 09:06:12,661 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-21 09:06:12,662 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:06:12 BoogieIcfgContainer [2022-07-21 09:06:12,663 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 09:06:12,664 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 09:06:12,664 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 09:06:12,666 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 09:06:12,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 09:06:12" (1/3) ... [2022-07-21 09:06:12,667 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41fd70c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:06:12, skipping insertion in model container [2022-07-21 09:06:12,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:06:12" (2/3) ... [2022-07-21 09:06:12,667 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41fd70c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:06:12, skipping insertion in model container [2022-07-21 09:06:12,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:06:12" (3/3) ... [2022-07-21 09:06:12,668 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-figure1-alt.wvr.c [2022-07-21 09:06:12,671 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-21 09:06:12,681 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 09:06:12,681 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 09:06:12,681 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-21 09:06:12,712 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-21 09:06:12,762 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 90 places, 89 transitions, 194 flow [2022-07-21 09:06:12,789 INFO L129 PetriNetUnfolder]: 6/87 cut-off events. [2022-07-21 09:06:12,789 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-21 09:06:12,792 INFO L84 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 87 events. 6/87 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 52 event pairs, 0 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2022-07-21 09:06:12,792 INFO L82 GeneralOperation]: Start removeDead. Operand has 90 places, 89 transitions, 194 flow [2022-07-21 09:06:12,795 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 79 places, 78 transitions, 168 flow [2022-07-21 09:06:12,810 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 09:06:12,816 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@790d5925, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@30de3f60 [2022-07-21 09:06:12,817 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-21 09:06:12,843 INFO L129 PetriNetUnfolder]: 6/77 cut-off events. [2022-07-21 09:06:12,849 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-21 09:06:12,849 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:06:12,850 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:06:12,850 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:06:12,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:06:12,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1515800342, now seen corresponding path program 1 times [2022-07-21 09:06:12,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:06:12,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001674216] [2022-07-21 09:06:12,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:06:12,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:06:12,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:06:13,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:13,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:06:13,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001674216] [2022-07-21 09:06:13,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001674216] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:06:13,028 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:06:13,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 09:06:13,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462389349] [2022-07-21 09:06:13,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:06:13,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 09:06:13,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:06:13,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 09:06:13,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 09:06:13,061 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 89 [2022-07-21 09:06:13,070 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 78 transitions, 168 flow. Second operand has 2 states, 2 states have (on average 80.5) internal successors, (161), 2 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:13,071 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:06:13,071 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 89 [2022-07-21 09:06:13,072 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:06:13,128 INFO L129 PetriNetUnfolder]: 11/107 cut-off events. [2022-07-21 09:06:13,128 INFO L130 PetriNetUnfolder]: For 21/22 co-relation queries the response was YES. [2022-07-21 09:06:13,129 INFO L84 FinitePrefix]: Finished finitePrefix Result has 141 conditions, 107 events. 11/107 cut-off events. For 21/22 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 146 event pairs, 3 based on Foata normal form. 11/109 useless extension candidates. Maximal degree in co-relation 67. Up to 19 conditions per place. [2022-07-21 09:06:13,130 INFO L132 encePairwiseOnDemand]: 85/89 looper letters, 6 selfloop transitions, 0 changer transitions 2/74 dead transitions. [2022-07-21 09:06:13,130 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 74 transitions, 172 flow [2022-07-21 09:06:13,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 09:06:13,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 09:06:13,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 166 transitions. [2022-07-21 09:06:13,138 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9325842696629213 [2022-07-21 09:06:13,139 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 166 transitions. [2022-07-21 09:06:13,139 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 166 transitions. [2022-07-21 09:06:13,140 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:06:13,141 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 166 transitions. [2022-07-21 09:06:13,143 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 83.0) internal successors, (166), 2 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:13,145 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:13,146 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:13,147 INFO L186 Difference]: Start difference. First operand has 79 places, 78 transitions, 168 flow. Second operand 2 states and 166 transitions. [2022-07-21 09:06:13,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 74 transitions, 172 flow [2022-07-21 09:06:13,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 74 transitions, 164 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-21 09:06:13,151 INFO L242 Difference]: Finished difference. Result has 76 places, 72 transitions, 148 flow [2022-07-21 09:06:13,153 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=148, PETRI_PLACES=76, PETRI_TRANSITIONS=72} [2022-07-21 09:06:13,155 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, -3 predicate places. [2022-07-21 09:06:13,155 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 72 transitions, 148 flow [2022-07-21 09:06:13,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 80.5) internal successors, (161), 2 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:13,156 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:06:13,156 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:06:13,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 09:06:13,156 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:06:13,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:06:13,157 INFO L85 PathProgramCache]: Analyzing trace with hash -79113043, now seen corresponding path program 1 times [2022-07-21 09:06:13,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:06:13,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495390980] [2022-07-21 09:06:13,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:06:13,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:06:13,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:06:13,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:13,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:06:13,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495390980] [2022-07-21 09:06:13,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495390980] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:06:13,641 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:06:13,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-21 09:06:13,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798332376] [2022-07-21 09:06:13,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:06:13,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-21 09:06:13,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:06:13,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-21 09:06:13,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-07-21 09:06:13,648 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2022-07-21 09:06:13,649 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 72 transitions, 148 flow. Second operand has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:13,649 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:06:13,649 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2022-07-21 09:06:13,654 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:06:14,013 INFO L129 PetriNetUnfolder]: 67/248 cut-off events. [2022-07-21 09:06:14,014 INFO L130 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2022-07-21 09:06:14,014 INFO L84 FinitePrefix]: Finished finitePrefix Result has 420 conditions, 248 events. 67/248 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 942 event pairs, 34 based on Foata normal form. 6/223 useless extension candidates. Maximal degree in co-relation 417. Up to 102 conditions per place. [2022-07-21 09:06:14,015 INFO L132 encePairwiseOnDemand]: 76/89 looper letters, 43 selfloop transitions, 11 changer transitions 6/103 dead transitions. [2022-07-21 09:06:14,016 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 103 transitions, 337 flow [2022-07-21 09:06:14,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 09:06:14,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-21 09:06:14,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 698 transitions. [2022-07-21 09:06:14,019 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.653558052434457 [2022-07-21 09:06:14,019 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 698 transitions. [2022-07-21 09:06:14,019 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 698 transitions. [2022-07-21 09:06:14,020 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:06:14,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 698 transitions. [2022-07-21 09:06:14,023 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 58.166666666666664) internal successors, (698), 12 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:14,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:14,025 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:14,026 INFO L186 Difference]: Start difference. First operand has 76 places, 72 transitions, 148 flow. Second operand 12 states and 698 transitions. [2022-07-21 09:06:14,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 103 transitions, 337 flow [2022-07-21 09:06:14,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 103 transitions, 337 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 09:06:14,028 INFO L242 Difference]: Finished difference. Result has 92 places, 79 transitions, 213 flow [2022-07-21 09:06:14,028 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=213, PETRI_PLACES=92, PETRI_TRANSITIONS=79} [2022-07-21 09:06:14,029 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 13 predicate places. [2022-07-21 09:06:14,029 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 79 transitions, 213 flow [2022-07-21 09:06:14,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:14,029 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:06:14,029 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:06:14,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 09:06:14,030 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:06:14,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:06:14,030 INFO L85 PathProgramCache]: Analyzing trace with hash -675229343, now seen corresponding path program 2 times [2022-07-21 09:06:14,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:06:14,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296014841] [2022-07-21 09:06:14,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:06:14,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:06:14,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:06:14,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:14,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:06:14,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296014841] [2022-07-21 09:06:14,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296014841] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:06:14,334 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:06:14,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-21 09:06:14,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362195880] [2022-07-21 09:06:14,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:06:14,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-21 09:06:14,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:06:14,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-21 09:06:14,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-07-21 09:06:14,337 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2022-07-21 09:06:14,337 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 79 transitions, 213 flow. Second operand has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:14,338 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:06:14,338 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2022-07-21 09:06:14,338 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:06:14,657 INFO L129 PetriNetUnfolder]: 68/263 cut-off events. [2022-07-21 09:06:14,658 INFO L130 PetriNetUnfolder]: For 66/66 co-relation queries the response was YES. [2022-07-21 09:06:14,659 INFO L84 FinitePrefix]: Finished finitePrefix Result has 541 conditions, 263 events. 68/263 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1102 event pairs, 35 based on Foata normal form. 1/260 useless extension candidates. Maximal degree in co-relation 530. Up to 102 conditions per place. [2022-07-21 09:06:14,660 INFO L132 encePairwiseOnDemand]: 77/89 looper letters, 40 selfloop transitions, 11 changer transitions 11/105 dead transitions. [2022-07-21 09:06:14,660 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 105 transitions, 429 flow [2022-07-21 09:06:14,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 09:06:14,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-21 09:06:14,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 695 transitions. [2022-07-21 09:06:14,662 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.650749063670412 [2022-07-21 09:06:14,662 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 695 transitions. [2022-07-21 09:06:14,662 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 695 transitions. [2022-07-21 09:06:14,662 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:06:14,662 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 695 transitions. [2022-07-21 09:06:14,664 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 57.916666666666664) internal successors, (695), 12 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:14,665 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:14,666 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:14,666 INFO L186 Difference]: Start difference. First operand has 92 places, 79 transitions, 213 flow. Second operand 12 states and 695 transitions. [2022-07-21 09:06:14,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 105 transitions, 429 flow [2022-07-21 09:06:14,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 105 transitions, 407 flow, removed 8 selfloop flow, removed 6 redundant places. [2022-07-21 09:06:14,669 INFO L242 Difference]: Finished difference. Result has 100 places, 80 transitions, 247 flow [2022-07-21 09:06:14,669 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=247, PETRI_PLACES=100, PETRI_TRANSITIONS=80} [2022-07-21 09:06:14,670 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 21 predicate places. [2022-07-21 09:06:14,670 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 80 transitions, 247 flow [2022-07-21 09:06:14,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:14,670 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:06:14,674 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:06:14,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 09:06:14,674 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:06:14,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:06:14,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1001813793, now seen corresponding path program 3 times [2022-07-21 09:06:14,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:06:14,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657003922] [2022-07-21 09:06:14,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:06:14,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:06:14,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:06:14,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:14,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:06:14,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657003922] [2022-07-21 09:06:14,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657003922] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:06:14,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:06:14,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-21 09:06:14,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444760858] [2022-07-21 09:06:14,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:06:14,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-21 09:06:14,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:06:14,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-21 09:06:14,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-07-21 09:06:14,925 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2022-07-21 09:06:14,926 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 80 transitions, 247 flow. Second operand has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:14,926 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:06:14,926 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2022-07-21 09:06:14,926 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:06:15,232 INFO L129 PetriNetUnfolder]: 72/296 cut-off events. [2022-07-21 09:06:15,233 INFO L130 PetriNetUnfolder]: For 174/174 co-relation queries the response was YES. [2022-07-21 09:06:15,234 INFO L84 FinitePrefix]: Finished finitePrefix Result has 667 conditions, 296 events. 72/296 cut-off events. For 174/174 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1336 event pairs, 37 based on Foata normal form. 1/291 useless extension candidates. Maximal degree in co-relation 652. Up to 105 conditions per place. [2022-07-21 09:06:15,235 INFO L132 encePairwiseOnDemand]: 77/89 looper letters, 48 selfloop transitions, 14 changer transitions 8/113 dead transitions. [2022-07-21 09:06:15,235 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 113 transitions, 519 flow [2022-07-21 09:06:15,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 09:06:15,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-21 09:06:15,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 704 transitions. [2022-07-21 09:06:15,237 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6591760299625468 [2022-07-21 09:06:15,237 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 704 transitions. [2022-07-21 09:06:15,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 704 transitions. [2022-07-21 09:06:15,238 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:06:15,238 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 704 transitions. [2022-07-21 09:06:15,239 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 58.666666666666664) internal successors, (704), 12 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:15,240 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:15,241 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:15,241 INFO L186 Difference]: Start difference. First operand has 100 places, 80 transitions, 247 flow. Second operand 12 states and 704 transitions. [2022-07-21 09:06:15,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 113 transitions, 519 flow [2022-07-21 09:06:15,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 113 transitions, 474 flow, removed 14 selfloop flow, removed 9 redundant places. [2022-07-21 09:06:15,244 INFO L242 Difference]: Finished difference. Result has 104 places, 84 transitions, 301 flow [2022-07-21 09:06:15,244 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=301, PETRI_PLACES=104, PETRI_TRANSITIONS=84} [2022-07-21 09:06:15,245 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 25 predicate places. [2022-07-21 09:06:15,245 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 84 transitions, 301 flow [2022-07-21 09:06:15,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:15,245 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:06:15,246 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:06:15,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 09:06:15,246 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:06:15,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:06:15,246 INFO L85 PathProgramCache]: Analyzing trace with hash 269524785, now seen corresponding path program 4 times [2022-07-21 09:06:15,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:06:15,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373813837] [2022-07-21 09:06:15,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:06:15,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:06:15,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:06:15,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:15,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:06:15,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373813837] [2022-07-21 09:06:15,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373813837] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:06:15,503 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:06:15,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-21 09:06:15,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639242739] [2022-07-21 09:06:15,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:06:15,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-21 09:06:15,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:06:15,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-21 09:06:15,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-07-21 09:06:15,505 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2022-07-21 09:06:15,506 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 84 transitions, 301 flow. Second operand has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:15,506 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:06:15,506 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2022-07-21 09:06:15,506 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:06:15,828 INFO L129 PetriNetUnfolder]: 71/301 cut-off events. [2022-07-21 09:06:15,828 INFO L130 PetriNetUnfolder]: For 225/234 co-relation queries the response was YES. [2022-07-21 09:06:15,829 INFO L84 FinitePrefix]: Finished finitePrefix Result has 691 conditions, 301 events. 71/301 cut-off events. For 225/234 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1386 event pairs, 40 based on Foata normal form. 3/298 useless extension candidates. Maximal degree in co-relation 674. Up to 105 conditions per place. [2022-07-21 09:06:15,830 INFO L132 encePairwiseOnDemand]: 77/89 looper letters, 50 selfloop transitions, 15 changer transitions 6/114 dead transitions. [2022-07-21 09:06:15,830 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 114 transitions, 559 flow [2022-07-21 09:06:15,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 09:06:15,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-21 09:06:15,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 703 transitions. [2022-07-21 09:06:15,832 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6582397003745318 [2022-07-21 09:06:15,832 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 703 transitions. [2022-07-21 09:06:15,832 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 703 transitions. [2022-07-21 09:06:15,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:06:15,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 703 transitions. [2022-07-21 09:06:15,834 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 58.583333333333336) internal successors, (703), 12 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:15,835 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:15,836 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:15,836 INFO L186 Difference]: Start difference. First operand has 104 places, 84 transitions, 301 flow. Second operand 12 states and 703 transitions. [2022-07-21 09:06:15,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 114 transitions, 559 flow [2022-07-21 09:06:15,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 114 transitions, 520 flow, removed 11 selfloop flow, removed 8 redundant places. [2022-07-21 09:06:15,839 INFO L242 Difference]: Finished difference. Result has 110 places, 86 transitions, 352 flow [2022-07-21 09:06:15,839 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=352, PETRI_PLACES=110, PETRI_TRANSITIONS=86} [2022-07-21 09:06:15,840 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 31 predicate places. [2022-07-21 09:06:15,840 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 86 transitions, 352 flow [2022-07-21 09:06:15,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:15,841 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:06:15,841 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:06:15,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 09:06:15,841 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:06:15,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:06:15,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1546636013, now seen corresponding path program 5 times [2022-07-21 09:06:15,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:06:15,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124998009] [2022-07-21 09:06:15,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:06:15,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:06:15,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:06:16,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:16,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:06:16,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124998009] [2022-07-21 09:06:16,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124998009] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:06:16,087 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:06:16,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-21 09:06:16,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239865100] [2022-07-21 09:06:16,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:06:16,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-21 09:06:16,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:06:16,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-21 09:06:16,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-07-21 09:06:16,089 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2022-07-21 09:06:16,090 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 86 transitions, 352 flow. Second operand has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:16,090 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:06:16,090 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2022-07-21 09:06:16,090 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:06:16,368 INFO L129 PetriNetUnfolder]: 71/283 cut-off events. [2022-07-21 09:06:16,368 INFO L130 PetriNetUnfolder]: For 320/332 co-relation queries the response was YES. [2022-07-21 09:06:16,369 INFO L84 FinitePrefix]: Finished finitePrefix Result has 696 conditions, 283 events. 71/283 cut-off events. For 320/332 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1259 event pairs, 34 based on Foata normal form. 4/282 useless extension candidates. Maximal degree in co-relation 676. Up to 105 conditions per place. [2022-07-21 09:06:16,370 INFO L132 encePairwiseOnDemand]: 77/89 looper letters, 42 selfloop transitions, 14 changer transitions 9/108 dead transitions. [2022-07-21 09:06:16,370 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 108 transitions, 563 flow [2022-07-21 09:06:16,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 09:06:16,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-21 09:06:16,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 696 transitions. [2022-07-21 09:06:16,372 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.651685393258427 [2022-07-21 09:06:16,373 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 696 transitions. [2022-07-21 09:06:16,373 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 696 transitions. [2022-07-21 09:06:16,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:06:16,373 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 696 transitions. [2022-07-21 09:06:16,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 58.0) internal successors, (696), 12 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:16,376 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:16,376 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:16,376 INFO L186 Difference]: Start difference. First operand has 110 places, 86 transitions, 352 flow. Second operand 12 states and 696 transitions. [2022-07-21 09:06:16,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 108 transitions, 563 flow [2022-07-21 09:06:16,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 108 transitions, 526 flow, removed 10 selfloop flow, removed 8 redundant places. [2022-07-21 09:06:16,379 INFO L242 Difference]: Finished difference. Result has 115 places, 86 transitions, 368 flow [2022-07-21 09:06:16,380 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=368, PETRI_PLACES=115, PETRI_TRANSITIONS=86} [2022-07-21 09:06:16,380 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 36 predicate places. [2022-07-21 09:06:16,380 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 86 transitions, 368 flow [2022-07-21 09:06:16,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:16,381 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:06:16,381 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:06:16,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-21 09:06:16,381 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:06:16,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:06:16,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1009642839, now seen corresponding path program 6 times [2022-07-21 09:06:16,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:06:16,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562444568] [2022-07-21 09:06:16,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:06:16,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:06:16,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:06:16,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:16,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:06:16,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562444568] [2022-07-21 09:06:16,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562444568] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:06:16,625 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:06:16,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-21 09:06:16,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825173526] [2022-07-21 09:06:16,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:06:16,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-21 09:06:16,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:06:16,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-21 09:06:16,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-07-21 09:06:16,627 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2022-07-21 09:06:16,628 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 86 transitions, 368 flow. Second operand has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:16,633 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:06:16,633 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2022-07-21 09:06:16,633 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:06:16,901 INFO L129 PetriNetUnfolder]: 68/250 cut-off events. [2022-07-21 09:06:16,901 INFO L130 PetriNetUnfolder]: For 316/316 co-relation queries the response was YES. [2022-07-21 09:06:16,902 INFO L84 FinitePrefix]: Finished finitePrefix Result has 642 conditions, 250 events. 68/250 cut-off events. For 316/316 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 981 event pairs, 34 based on Foata normal form. 1/245 useless extension candidates. Maximal degree in co-relation 620. Up to 105 conditions per place. [2022-07-21 09:06:16,903 INFO L132 encePairwiseOnDemand]: 77/89 looper letters, 34 selfloop transitions, 14 changer transitions 11/102 dead transitions. [2022-07-21 09:06:16,903 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 102 transitions, 547 flow [2022-07-21 09:06:16,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 09:06:16,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-21 09:06:16,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 690 transitions. [2022-07-21 09:06:16,905 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6460674157303371 [2022-07-21 09:06:16,905 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 690 transitions. [2022-07-21 09:06:16,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 690 transitions. [2022-07-21 09:06:16,905 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:06:16,906 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 690 transitions. [2022-07-21 09:06:16,907 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 57.5) internal successors, (690), 12 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:16,908 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:16,908 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:16,908 INFO L186 Difference]: Start difference. First operand has 115 places, 86 transitions, 368 flow. Second operand 12 states and 690 transitions. [2022-07-21 09:06:16,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 102 transitions, 547 flow [2022-07-21 09:06:16,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 102 transitions, 499 flow, removed 9 selfloop flow, removed 12 redundant places. [2022-07-21 09:06:16,912 INFO L242 Difference]: Finished difference. Result has 114 places, 85 transitions, 350 flow [2022-07-21 09:06:16,912 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=350, PETRI_PLACES=114, PETRI_TRANSITIONS=85} [2022-07-21 09:06:16,912 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 35 predicate places. [2022-07-21 09:06:16,912 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 85 transitions, 350 flow [2022-07-21 09:06:16,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:16,913 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:06:16,913 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:06:16,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-21 09:06:16,913 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:06:16,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:06:16,914 INFO L85 PathProgramCache]: Analyzing trace with hash 239848237, now seen corresponding path program 1 times [2022-07-21 09:06:16,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:06:16,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984356785] [2022-07-21 09:06:16,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:06:16,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:06:16,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:06:17,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:17,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:06:17,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984356785] [2022-07-21 09:06:17,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984356785] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:06:17,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313630364] [2022-07-21 09:06:17,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:06:17,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:06:17,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:06:17,206 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:06:17,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 09:06:17,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:06:17,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-21 09:06:17,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:06:17,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:17,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:06:18,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:18,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313630364] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:06:18,043 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:06:18,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 35 [2022-07-21 09:06:18,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353532223] [2022-07-21 09:06:18,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:06:18,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-21 09:06:18,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:06:18,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-21 09:06:18,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1008, Unknown=0, NotChecked=0, Total=1190 [2022-07-21 09:06:18,046 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-07-21 09:06:18,048 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 85 transitions, 350 flow. Second operand has 35 states, 35 states have (on average 53.65714285714286) internal successors, (1878), 35 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:18,048 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:06:18,048 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-07-21 09:06:18,048 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:06:19,472 INFO L129 PetriNetUnfolder]: 168/599 cut-off events. [2022-07-21 09:06:19,472 INFO L130 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2022-07-21 09:06:19,473 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1325 conditions, 599 events. 168/599 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 3330 event pairs, 9 based on Foata normal form. 13/612 useless extension candidates. Maximal degree in co-relation 1304. Up to 111 conditions per place. [2022-07-21 09:06:19,475 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 114 selfloop transitions, 82 changer transitions 13/251 dead transitions. [2022-07-21 09:06:19,475 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 251 transitions, 1334 flow [2022-07-21 09:06:19,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-07-21 09:06:19,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2022-07-21 09:06:19,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 2702 transitions. [2022-07-21 09:06:19,480 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6324906367041199 [2022-07-21 09:06:19,480 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 2702 transitions. [2022-07-21 09:06:19,480 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 2702 transitions. [2022-07-21 09:06:19,489 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:06:19,490 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 2702 transitions. [2022-07-21 09:06:19,494 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 56.291666666666664) internal successors, (2702), 48 states have internal predecessors, (2702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:19,499 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 89.0) internal successors, (4361), 49 states have internal predecessors, (4361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:19,500 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 89.0) internal successors, (4361), 49 states have internal predecessors, (4361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:19,500 INFO L186 Difference]: Start difference. First operand has 114 places, 85 transitions, 350 flow. Second operand 48 states and 2702 transitions. [2022-07-21 09:06:19,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 251 transitions, 1334 flow [2022-07-21 09:06:19,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 251 transitions, 1228 flow, removed 24 selfloop flow, removed 16 redundant places. [2022-07-21 09:06:19,504 INFO L242 Difference]: Finished difference. Result has 152 places, 152 transitions, 752 flow [2022-07-21 09:06:19,505 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=752, PETRI_PLACES=152, PETRI_TRANSITIONS=152} [2022-07-21 09:06:19,505 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 73 predicate places. [2022-07-21 09:06:19,505 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 152 transitions, 752 flow [2022-07-21 09:06:19,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 53.65714285714286) internal successors, (1878), 35 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:19,506 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:06:19,506 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:06:19,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-21 09:06:19,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:06:19,723 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:06:19,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:06:19,723 INFO L85 PathProgramCache]: Analyzing trace with hash 2139285437, now seen corresponding path program 2 times [2022-07-21 09:06:19,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:06:19,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28050142] [2022-07-21 09:06:19,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:06:19,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:06:19,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:06:19,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:19,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:06:19,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28050142] [2022-07-21 09:06:19,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28050142] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:06:19,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756063340] [2022-07-21 09:06:19,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 09:06:19,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:06:19,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:06:20,004 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:06:20,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 09:06:20,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 09:06:20,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:06:20,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-21 09:06:20,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:06:20,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:20,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:06:20,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:20,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756063340] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:06:20,796 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:06:20,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 35 [2022-07-21 09:06:20,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327674973] [2022-07-21 09:06:20,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:06:20,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-21 09:06:20,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:06:20,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-21 09:06:20,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1034, Unknown=0, NotChecked=0, Total=1190 [2022-07-21 09:06:20,800 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-07-21 09:06:20,801 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 152 transitions, 752 flow. Second operand has 35 states, 35 states have (on average 53.68571428571428) internal successors, (1879), 35 states have internal predecessors, (1879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:20,801 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:06:20,802 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-07-21 09:06:20,802 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:06:22,480 INFO L129 PetriNetUnfolder]: 226/775 cut-off events. [2022-07-21 09:06:22,480 INFO L130 PetriNetUnfolder]: For 686/686 co-relation queries the response was YES. [2022-07-21 09:06:22,482 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2177 conditions, 775 events. 226/775 cut-off events. For 686/686 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 4712 event pairs, 13 based on Foata normal form. 1/775 useless extension candidates. Maximal degree in co-relation 2152. Up to 211 conditions per place. [2022-07-21 09:06:22,484 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 99 selfloop transitions, 159 changer transitions 6/306 dead transitions. [2022-07-21 09:06:22,484 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 306 transitions, 2042 flow [2022-07-21 09:06:22,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-07-21 09:06:22,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2022-07-21 09:06:22,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 3061 transitions. [2022-07-21 09:06:22,488 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6253319713993871 [2022-07-21 09:06:22,488 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 3061 transitions. [2022-07-21 09:06:22,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 3061 transitions. [2022-07-21 09:06:22,489 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:06:22,489 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 3061 transitions. [2022-07-21 09:06:22,493 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 55.654545454545456) internal successors, (3061), 55 states have internal predecessors, (3061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:22,498 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 89.0) internal successors, (4984), 56 states have internal predecessors, (4984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:22,499 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 89.0) internal successors, (4984), 56 states have internal predecessors, (4984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:22,499 INFO L186 Difference]: Start difference. First operand has 152 places, 152 transitions, 752 flow. Second operand 55 states and 3061 transitions. [2022-07-21 09:06:22,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 306 transitions, 2042 flow [2022-07-21 09:06:22,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 306 transitions, 1875 flow, removed 69 selfloop flow, removed 9 redundant places. [2022-07-21 09:06:22,513 INFO L242 Difference]: Finished difference. Result has 204 places, 241 transitions, 1570 flow [2022-07-21 09:06:22,513 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=665, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=1570, PETRI_PLACES=204, PETRI_TRANSITIONS=241} [2022-07-21 09:06:22,514 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 125 predicate places. [2022-07-21 09:06:22,514 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 241 transitions, 1570 flow [2022-07-21 09:06:22,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 53.68571428571428) internal successors, (1879), 35 states have internal predecessors, (1879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:22,515 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:06:22,515 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:06:22,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 09:06:22,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-07-21 09:06:22,732 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:06:22,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:06:22,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1975222373, now seen corresponding path program 3 times [2022-07-21 09:06:22,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:06:22,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933221071] [2022-07-21 09:06:22,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:06:22,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:06:22,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:06:22,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:22,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:06:22,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933221071] [2022-07-21 09:06:22,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933221071] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:06:22,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935104340] [2022-07-21 09:06:22,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 09:06:22,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:06:22,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:06:22,985 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:06:22,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 09:06:23,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-21 09:06:23,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:06:23,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-21 09:06:23,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:06:23,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:23,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:06:23,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:23,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935104340] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:06:23,766 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:06:23,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 35 [2022-07-21 09:06:23,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806355054] [2022-07-21 09:06:23,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:06:23,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-21 09:06:23,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:06:23,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-21 09:06:23,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1026, Unknown=0, NotChecked=0, Total=1190 [2022-07-21 09:06:23,769 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-07-21 09:06:23,771 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 241 transitions, 1570 flow. Second operand has 35 states, 35 states have (on average 53.65714285714286) internal successors, (1878), 35 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:23,771 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:06:23,771 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-07-21 09:06:23,771 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:06:24,884 INFO L129 PetriNetUnfolder]: 279/963 cut-off events. [2022-07-21 09:06:24,884 INFO L130 PetriNetUnfolder]: For 1582/1582 co-relation queries the response was YES. [2022-07-21 09:06:24,888 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3264 conditions, 963 events. 279/963 cut-off events. For 1582/1582 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 6380 event pairs, 20 based on Foata normal form. 1/950 useless extension candidates. Maximal degree in co-relation 3231. Up to 292 conditions per place. [2022-07-21 09:06:24,891 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 133 selfloop transitions, 188 changer transitions 6/369 dead transitions. [2022-07-21 09:06:24,892 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 369 transitions, 3081 flow [2022-07-21 09:06:24,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-21 09:06:24,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-07-21 09:06:24,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2186 transitions. [2022-07-21 09:06:24,894 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6297896859694613 [2022-07-21 09:06:24,895 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2186 transitions. [2022-07-21 09:06:24,895 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2186 transitions. [2022-07-21 09:06:24,895 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:06:24,895 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2186 transitions. [2022-07-21 09:06:24,898 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 56.05128205128205) internal successors, (2186), 39 states have internal predecessors, (2186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:24,901 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 89.0) internal successors, (3560), 40 states have internal predecessors, (3560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:24,902 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 89.0) internal successors, (3560), 40 states have internal predecessors, (3560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:24,902 INFO L186 Difference]: Start difference. First operand has 204 places, 241 transitions, 1570 flow. Second operand 39 states and 2186 transitions. [2022-07-21 09:06:24,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 369 transitions, 3081 flow [2022-07-21 09:06:24,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 369 transitions, 2820 flow, removed 74 selfloop flow, removed 18 redundant places. [2022-07-21 09:06:24,915 INFO L242 Difference]: Finished difference. Result has 232 places, 299 transitions, 2385 flow [2022-07-21 09:06:24,916 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=1388, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=2385, PETRI_PLACES=232, PETRI_TRANSITIONS=299} [2022-07-21 09:06:24,916 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 153 predicate places. [2022-07-21 09:06:24,916 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 299 transitions, 2385 flow [2022-07-21 09:06:24,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 53.65714285714286) internal successors, (1878), 35 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:24,917 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:06:24,917 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:06:24,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 09:06:25,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:06:25,136 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:06:25,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:06:25,137 INFO L85 PathProgramCache]: Analyzing trace with hash -6530063, now seen corresponding path program 4 times [2022-07-21 09:06:25,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:06:25,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990991972] [2022-07-21 09:06:25,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:06:25,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:06:25,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:06:25,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:25,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:06:25,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990991972] [2022-07-21 09:06:25,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990991972] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:06:25,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696858618] [2022-07-21 09:06:25,380 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 09:06:25,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:06:25,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:06:25,381 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:06:25,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 09:06:25,426 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 09:06:25,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:06:25,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-21 09:06:25,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:06:25,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:25,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:06:26,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:26,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696858618] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:06:26,151 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:06:26,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 35 [2022-07-21 09:06:26,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199478146] [2022-07-21 09:06:26,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:06:26,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-21 09:06:26,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:06:26,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-21 09:06:26,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1019, Unknown=0, NotChecked=0, Total=1190 [2022-07-21 09:06:26,154 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-07-21 09:06:26,175 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 299 transitions, 2385 flow. Second operand has 35 states, 35 states have (on average 53.65714285714286) internal successors, (1878), 35 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:26,176 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:06:26,176 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-07-21 09:06:26,176 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:06:29,108 INFO L129 PetriNetUnfolder]: 364/1329 cut-off events. [2022-07-21 09:06:29,108 INFO L130 PetriNetUnfolder]: For 3205/3207 co-relation queries the response was YES. [2022-07-21 09:06:29,112 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4795 conditions, 1329 events. 364/1329 cut-off events. For 3205/3207 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 9960 event pairs, 21 based on Foata normal form. 3/1311 useless extension candidates. Maximal degree in co-relation 4758. Up to 194 conditions per place. [2022-07-21 09:06:29,117 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 168 selfloop transitions, 308 changer transitions 6/524 dead transitions. [2022-07-21 09:06:29,117 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 524 transitions, 4927 flow [2022-07-21 09:06:29,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-07-21 09:06:29,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2022-07-21 09:06:29,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 4518 transitions. [2022-07-21 09:06:29,129 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6267166042446941 [2022-07-21 09:06:29,129 INFO L72 ComplementDD]: Start complementDD. Operand 81 states and 4518 transitions. [2022-07-21 09:06:29,129 INFO L73 IsDeterministic]: Start isDeterministic. Operand 81 states and 4518 transitions. [2022-07-21 09:06:29,131 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:06:29,131 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 81 states and 4518 transitions. [2022-07-21 09:06:29,139 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 82 states, 81 states have (on average 55.77777777777778) internal successors, (4518), 81 states have internal predecessors, (4518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:29,147 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 82 states, 82 states have (on average 89.0) internal successors, (7298), 82 states have internal predecessors, (7298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:29,148 INFO L81 ComplementDD]: Finished complementDD. Result has 82 states, 82 states have (on average 89.0) internal successors, (7298), 82 states have internal predecessors, (7298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:29,148 INFO L186 Difference]: Start difference. First operand has 232 places, 299 transitions, 2385 flow. Second operand 81 states and 4518 transitions. [2022-07-21 09:06:29,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 524 transitions, 4927 flow [2022-07-21 09:06:29,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 524 transitions, 4790 flow, removed 62 selfloop flow, removed 8 redundant places. [2022-07-21 09:06:29,170 INFO L242 Difference]: Finished difference. Result has 315 places, 399 transitions, 4004 flow [2022-07-21 09:06:29,171 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=2346, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=214, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=81, PETRI_FLOW=4004, PETRI_PLACES=315, PETRI_TRANSITIONS=399} [2022-07-21 09:06:29,171 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 236 predicate places. [2022-07-21 09:06:29,171 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 399 transitions, 4004 flow [2022-07-21 09:06:29,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 53.65714285714286) internal successors, (1878), 35 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:29,172 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:06:29,172 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:06:29,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-21 09:06:29,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:06:29,387 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:06:29,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:06:29,388 INFO L85 PathProgramCache]: Analyzing trace with hash 820807317, now seen corresponding path program 5 times [2022-07-21 09:06:29,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:06:29,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076580037] [2022-07-21 09:06:29,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:06:29,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:06:29,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:06:29,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:29,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:06:29,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076580037] [2022-07-21 09:06:29,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076580037] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:06:29,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218627281] [2022-07-21 09:06:29,645 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 09:06:29,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:06:29,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:06:29,647 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:06:29,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 09:06:29,691 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 09:06:29,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:06:29,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-21 09:06:29,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:06:30,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:30,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:06:30,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:30,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218627281] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:06:30,392 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:06:30,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 35 [2022-07-21 09:06:30,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752773940] [2022-07-21 09:06:30,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:06:30,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-21 09:06:30,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:06:30,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-21 09:06:30,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1019, Unknown=0, NotChecked=0, Total=1190 [2022-07-21 09:06:30,394 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-07-21 09:06:30,395 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 399 transitions, 4004 flow. Second operand has 35 states, 35 states have (on average 53.68571428571428) internal successors, (1879), 35 states have internal predecessors, (1879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:30,395 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:06:30,395 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-07-21 09:06:30,395 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:06:33,348 INFO L129 PetriNetUnfolder]: 387/1376 cut-off events. [2022-07-21 09:06:33,349 INFO L130 PetriNetUnfolder]: For 6525/6527 co-relation queries the response was YES. [2022-07-21 09:06:33,353 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6054 conditions, 1376 events. 387/1376 cut-off events. For 6525/6527 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 10409 event pairs, 22 based on Foata normal form. 3/1361 useless extension candidates. Maximal degree in co-relation 6005. Up to 215 conditions per place. [2022-07-21 09:06:33,359 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 180 selfloop transitions, 328 changer transitions 6/556 dead transitions. [2022-07-21 09:06:33,359 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 556 transitions, 6290 flow [2022-07-21 09:06:33,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-07-21 09:06:33,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2022-07-21 09:06:33,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 4528 transitions. [2022-07-21 09:06:33,363 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6281037591899015 [2022-07-21 09:06:33,363 INFO L72 ComplementDD]: Start complementDD. Operand 81 states and 4528 transitions. [2022-07-21 09:06:33,363 INFO L73 IsDeterministic]: Start isDeterministic. Operand 81 states and 4528 transitions. [2022-07-21 09:06:33,364 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:06:33,364 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 81 states and 4528 transitions. [2022-07-21 09:06:33,369 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 82 states, 81 states have (on average 55.901234567901234) internal successors, (4528), 81 states have internal predecessors, (4528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:33,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 82 states, 82 states have (on average 89.0) internal successors, (7298), 82 states have internal predecessors, (7298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:33,375 INFO L81 ComplementDD]: Finished complementDD. Result has 82 states, 82 states have (on average 89.0) internal successors, (7298), 82 states have internal predecessors, (7298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:33,375 INFO L186 Difference]: Start difference. First operand has 315 places, 399 transitions, 4004 flow. Second operand 81 states and 4528 transitions. [2022-07-21 09:06:33,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 556 transitions, 6290 flow [2022-07-21 09:06:33,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 556 transitions, 5986 flow, removed 82 selfloop flow, removed 19 redundant places. [2022-07-21 09:06:33,409 INFO L242 Difference]: Finished difference. Result has 381 places, 434 transitions, 4948 flow [2022-07-21 09:06:33,410 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=3714, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=289, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=81, PETRI_FLOW=4948, PETRI_PLACES=381, PETRI_TRANSITIONS=434} [2022-07-21 09:06:33,410 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 302 predicate places. [2022-07-21 09:06:33,410 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 434 transitions, 4948 flow [2022-07-21 09:06:33,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 53.68571428571428) internal successors, (1879), 35 states have internal predecessors, (1879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:33,411 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:06:33,411 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:06:33,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-21 09:06:33,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-21 09:06:33,629 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:06:33,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:06:33,629 INFO L85 PathProgramCache]: Analyzing trace with hash -609410941, now seen corresponding path program 6 times [2022-07-21 09:06:33,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:06:33,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786784612] [2022-07-21 09:06:33,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:06:33,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:06:33,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:06:33,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:33,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:06:33,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786784612] [2022-07-21 09:06:33,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786784612] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:06:33,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374848026] [2022-07-21 09:06:33,881 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 09:06:33,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:06:33,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:06:33,884 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:06:33,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 09:06:33,945 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-07-21 09:06:33,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:06:33,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-21 09:06:33,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:06:34,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:34,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:06:34,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:34,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374848026] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:06:34,784 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:06:34,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 35 [2022-07-21 09:06:34,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289152706] [2022-07-21 09:06:34,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:06:34,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-21 09:06:34,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:06:34,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-21 09:06:34,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1017, Unknown=0, NotChecked=0, Total=1190 [2022-07-21 09:06:34,786 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-07-21 09:06:34,788 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 434 transitions, 4948 flow. Second operand has 35 states, 35 states have (on average 53.65714285714286) internal successors, (1878), 35 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:34,788 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:06:34,788 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-07-21 09:06:34,788 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:06:36,164 INFO L129 PetriNetUnfolder]: 514/1746 cut-off events. [2022-07-21 09:06:36,164 INFO L130 PetriNetUnfolder]: For 12376/12378 co-relation queries the response was YES. [2022-07-21 09:06:36,171 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8693 conditions, 1746 events. 514/1746 cut-off events. For 12376/12378 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 13916 event pairs, 25 based on Foata normal form. 1/1741 useless extension candidates. Maximal degree in co-relation 8636. Up to 483 conditions per place. [2022-07-21 09:06:36,180 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 222 selfloop transitions, 332 changer transitions 6/602 dead transitions. [2022-07-21 09:06:36,180 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 602 transitions, 7994 flow [2022-07-21 09:06:36,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-21 09:06:36,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-07-21 09:06:36,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2185 transitions. [2022-07-21 09:06:36,183 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6295015845577643 [2022-07-21 09:06:36,183 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2185 transitions. [2022-07-21 09:06:36,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2185 transitions. [2022-07-21 09:06:36,184 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:06:36,184 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2185 transitions. [2022-07-21 09:06:36,187 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 56.02564102564103) internal successors, (2185), 39 states have internal predecessors, (2185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:36,192 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 89.0) internal successors, (3560), 40 states have internal predecessors, (3560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:36,192 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 89.0) internal successors, (3560), 40 states have internal predecessors, (3560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:36,192 INFO L186 Difference]: Start difference. First operand has 381 places, 434 transitions, 4948 flow. Second operand 39 states and 2185 transitions. [2022-07-21 09:06:36,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 602 transitions, 7994 flow [2022-07-21 09:06:36,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 602 transitions, 7223 flow, removed 117 selfloop flow, removed 56 redundant places. [2022-07-21 09:06:36,253 INFO L242 Difference]: Finished difference. Result has 370 places, 524 transitions, 6675 flow [2022-07-21 09:06:36,254 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=4394, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=243, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=6675, PETRI_PLACES=370, PETRI_TRANSITIONS=524} [2022-07-21 09:06:36,255 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 291 predicate places. [2022-07-21 09:06:36,255 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 524 transitions, 6675 flow [2022-07-21 09:06:36,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 53.65714285714286) internal successors, (1878), 35 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:36,256 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:06:36,256 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:06:36,273 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-21 09:06:36,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:06:36,473 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:06:36,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:06:36,474 INFO L85 PathProgramCache]: Analyzing trace with hash -248882329, now seen corresponding path program 7 times [2022-07-21 09:06:36,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:06:36,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358031575] [2022-07-21 09:06:36,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:06:36,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:06:36,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:06:36,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:36,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:06:36,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358031575] [2022-07-21 09:06:36,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358031575] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:06:36,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140550366] [2022-07-21 09:06:36,738 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 09:06:36,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:06:36,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:06:36,739 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:06:36,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-21 09:06:36,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:06:36,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-21 09:06:36,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:06:37,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:37,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:06:37,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:37,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140550366] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:06:37,511 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:06:37,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 35 [2022-07-21 09:06:37,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324921249] [2022-07-21 09:06:37,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:06:37,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-21 09:06:37,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:06:37,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-21 09:06:37,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1024, Unknown=0, NotChecked=0, Total=1190 [2022-07-21 09:06:37,513 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-07-21 09:06:37,514 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 524 transitions, 6675 flow. Second operand has 35 states, 35 states have (on average 53.65714285714286) internal successors, (1878), 35 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:37,514 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:06:37,514 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-07-21 09:06:37,514 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:06:40,128 INFO L129 PetriNetUnfolder]: 574/1932 cut-off events. [2022-07-21 09:06:40,128 INFO L130 PetriNetUnfolder]: For 16164/16166 co-relation queries the response was YES. [2022-07-21 09:06:40,139 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10161 conditions, 1932 events. 574/1932 cut-off events. For 16164/16166 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 15813 event pairs, 26 based on Foata normal form. 1/1926 useless extension candidates. Maximal degree in co-relation 10094. Up to 488 conditions per place. [2022-07-21 09:06:40,148 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 187 selfloop transitions, 443 changer transitions 6/678 dead transitions. [2022-07-21 09:06:40,149 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 678 transitions, 9597 flow [2022-07-21 09:06:40,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-07-21 09:06:40,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2022-07-21 09:06:40,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 3334 transitions. [2022-07-21 09:06:40,151 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6243445692883896 [2022-07-21 09:06:40,151 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 3334 transitions. [2022-07-21 09:06:40,152 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 3334 transitions. [2022-07-21 09:06:40,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:06:40,152 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 3334 transitions. [2022-07-21 09:06:40,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 55.56666666666667) internal successors, (3334), 60 states have internal predecessors, (3334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:40,159 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 89.0) internal successors, (5429), 61 states have internal predecessors, (5429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:40,160 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 89.0) internal successors, (5429), 61 states have internal predecessors, (5429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:40,160 INFO L186 Difference]: Start difference. First operand has 370 places, 524 transitions, 6675 flow. Second operand 60 states and 3334 transitions. [2022-07-21 09:06:40,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 678 transitions, 9597 flow [2022-07-21 09:06:40,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 678 transitions, 9352 flow, removed 97 selfloop flow, removed 12 redundant places. [2022-07-21 09:06:40,246 INFO L242 Difference]: Finished difference. Result has 428 places, 605 transitions, 8996 flow [2022-07-21 09:06:40,247 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=6538, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=367, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=8996, PETRI_PLACES=428, PETRI_TRANSITIONS=605} [2022-07-21 09:06:40,247 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 349 predicate places. [2022-07-21 09:06:40,248 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 605 transitions, 8996 flow [2022-07-21 09:06:40,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 53.65714285714286) internal successors, (1878), 35 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:40,248 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:06:40,248 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:06:40,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-21 09:06:40,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:06:40,466 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:06:40,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:06:40,466 INFO L85 PathProgramCache]: Analyzing trace with hash -974553547, now seen corresponding path program 8 times [2022-07-21 09:06:40,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:06:40,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187099166] [2022-07-21 09:06:40,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:06:40,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:06:40,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:06:40,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:40,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:06:40,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187099166] [2022-07-21 09:06:40,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187099166] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:06:40,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122937927] [2022-07-21 09:06:40,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 09:06:40,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:06:40,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:06:40,767 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:06:40,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-21 09:06:40,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 09:06:40,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:06:40,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-21 09:06:40,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:06:41,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:41,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:06:41,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:41,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122937927] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:06:41,459 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:06:41,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 35 [2022-07-21 09:06:41,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164532389] [2022-07-21 09:06:41,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:06:41,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-21 09:06:41,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:06:41,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-21 09:06:41,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=992, Unknown=0, NotChecked=0, Total=1190 [2022-07-21 09:06:41,461 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-07-21 09:06:41,462 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 605 transitions, 8996 flow. Second operand has 35 states, 35 states have (on average 53.65714285714286) internal successors, (1878), 35 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:41,462 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:06:41,462 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-07-21 09:06:41,462 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:06:42,520 INFO L129 PetriNetUnfolder]: 574/1942 cut-off events. [2022-07-21 09:06:42,521 INFO L130 PetriNetUnfolder]: For 18163/18177 co-relation queries the response was YES. [2022-07-21 09:06:42,534 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11175 conditions, 1942 events. 574/1942 cut-off events. For 18163/18177 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 15957 event pairs, 60 based on Foata normal form. 5/1938 useless extension candidates. Maximal degree in co-relation 11097. Up to 758 conditions per place. [2022-07-21 09:06:42,544 INFO L132 encePairwiseOnDemand]: 69/89 looper letters, 244 selfloop transitions, 346 changer transitions 6/638 dead transitions. [2022-07-21 09:06:42,544 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 638 transitions, 10522 flow [2022-07-21 09:06:42,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-21 09:06:42,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-07-21 09:06:42,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1452 transitions. [2022-07-21 09:06:42,546 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6274848746758859 [2022-07-21 09:06:42,546 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1452 transitions. [2022-07-21 09:06:42,546 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1452 transitions. [2022-07-21 09:06:42,546 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:06:42,546 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1452 transitions. [2022-07-21 09:06:42,548 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 55.84615384615385) internal successors, (1452), 26 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:42,549 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 89.0) internal successors, (2403), 27 states have internal predecessors, (2403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:42,550 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 89.0) internal successors, (2403), 27 states have internal predecessors, (2403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:42,550 INFO L186 Difference]: Start difference. First operand has 428 places, 605 transitions, 8996 flow. Second operand 26 states and 1452 transitions. [2022-07-21 09:06:42,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 638 transitions, 10522 flow [2022-07-21 09:06:42,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 638 transitions, 10144 flow, removed 102 selfloop flow, removed 27 redundant places. [2022-07-21 09:06:42,688 INFO L242 Difference]: Finished difference. Result has 429 places, 610 transitions, 9687 flow [2022-07-21 09:06:42,689 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=8630, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=341, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=9687, PETRI_PLACES=429, PETRI_TRANSITIONS=610} [2022-07-21 09:06:42,689 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 350 predicate places. [2022-07-21 09:06:42,689 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 610 transitions, 9687 flow [2022-07-21 09:06:42,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 53.65714285714286) internal successors, (1878), 35 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:42,690 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:06:42,690 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:06:42,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-21 09:06:42,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-21 09:06:42,904 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:06:42,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:06:42,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1457300325, now seen corresponding path program 9 times [2022-07-21 09:06:42,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:06:42,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845715419] [2022-07-21 09:06:42,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:06:42,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:06:42,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:06:43,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:43,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:06:43,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845715419] [2022-07-21 09:06:43,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845715419] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:06:43,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842931233] [2022-07-21 09:06:43,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 09:06:43,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:06:43,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:06:43,111 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:06:43,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-21 09:06:43,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-21 09:06:43,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:06:43,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-21 09:06:43,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:06:43,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:43,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:06:43,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:43,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842931233] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:06:43,990 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:06:43,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2022-07-21 09:06:43,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504052388] [2022-07-21 09:06:43,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:06:43,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-21 09:06:43,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:06:43,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-21 09:06:43,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1068, Unknown=0, NotChecked=0, Total=1260 [2022-07-21 09:06:43,994 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-07-21 09:06:43,995 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 610 transitions, 9687 flow. Second operand has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:43,996 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:06:43,996 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-07-21 09:06:43,996 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:06:47,749 INFO L129 PetriNetUnfolder]: 801/2801 cut-off events. [2022-07-21 09:06:47,749 INFO L130 PetriNetUnfolder]: For 30194/30196 co-relation queries the response was YES. [2022-07-21 09:06:47,765 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16697 conditions, 2801 events. 801/2801 cut-off events. For 30194/30196 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 25772 event pairs, 35 based on Foata normal form. 2/2794 useless extension candidates. Maximal degree in co-relation 16617. Up to 493 conditions per place. [2022-07-21 09:06:47,777 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 215 selfloop transitions, 689 changer transitions 12/958 dead transitions. [2022-07-21 09:06:47,778 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 520 places, 958 transitions, 16814 flow [2022-07-21 09:06:47,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-07-21 09:06:47,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2022-07-21 09:06:47,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 5261 transitions. [2022-07-21 09:06:47,794 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6222353636901242 [2022-07-21 09:06:47,795 INFO L72 ComplementDD]: Start complementDD. Operand 95 states and 5261 transitions. [2022-07-21 09:06:47,795 INFO L73 IsDeterministic]: Start isDeterministic. Operand 95 states and 5261 transitions. [2022-07-21 09:06:47,796 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:06:47,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 95 states and 5261 transitions. [2022-07-21 09:06:47,800 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 96 states, 95 states have (on average 55.37894736842105) internal successors, (5261), 95 states have internal predecessors, (5261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:47,805 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 96 states, 96 states have (on average 89.0) internal successors, (8544), 96 states have internal predecessors, (8544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:47,806 INFO L81 ComplementDD]: Finished complementDD. Result has 96 states, 96 states have (on average 89.0) internal successors, (8544), 96 states have internal predecessors, (8544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:47,807 INFO L186 Difference]: Start difference. First operand has 429 places, 610 transitions, 9687 flow. Second operand 95 states and 5261 transitions. [2022-07-21 09:06:47,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 520 places, 958 transitions, 16814 flow [2022-07-21 09:06:48,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 501 places, 958 transitions, 16379 flow, removed 11 selfloop flow, removed 19 redundant places. [2022-07-21 09:06:48,049 INFO L242 Difference]: Finished difference. Result has 522 places, 850 transitions, 15829 flow [2022-07-21 09:06:48,049 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=9390, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=610, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=470, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=95, PETRI_FLOW=15829, PETRI_PLACES=522, PETRI_TRANSITIONS=850} [2022-07-21 09:06:48,050 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 443 predicate places. [2022-07-21 09:06:48,051 INFO L495 AbstractCegarLoop]: Abstraction has has 522 places, 850 transitions, 15829 flow [2022-07-21 09:06:48,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:48,051 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:06:48,051 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:06:48,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-21 09:06:48,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-21 09:06:48,269 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:06:48,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:06:48,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1685575279, now seen corresponding path program 10 times [2022-07-21 09:06:48,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:06:48,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112417748] [2022-07-21 09:06:48,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:06:48,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:06:48,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:06:48,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:48,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:06:48,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112417748] [2022-07-21 09:06:48,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112417748] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:06:48,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4538213] [2022-07-21 09:06:48,594 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 09:06:48,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:06:48,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:06:48,595 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:06:48,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-21 09:06:48,652 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 09:06:48,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:06:48,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-21 09:06:48,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:06:49,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:49,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:06:49,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:49,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4538213] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:06:49,365 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:06:49,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 35 [2022-07-21 09:06:49,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765948170] [2022-07-21 09:06:49,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:06:49,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-21 09:06:49,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:06:49,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-21 09:06:49,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1016, Unknown=0, NotChecked=0, Total=1190 [2022-07-21 09:06:49,369 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-07-21 09:06:49,369 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 850 transitions, 15829 flow. Second operand has 35 states, 35 states have (on average 53.65714285714286) internal successors, (1878), 35 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:49,370 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:06:49,370 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-07-21 09:06:49,370 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:06:52,103 INFO L129 PetriNetUnfolder]: 939/3221 cut-off events. [2022-07-21 09:06:52,104 INFO L130 PetriNetUnfolder]: For 58668/58670 co-relation queries the response was YES. [2022-07-21 09:06:52,126 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22162 conditions, 3221 events. 939/3221 cut-off events. For 58668/58670 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 30406 event pairs, 43 based on Foata normal form. 2/3216 useless extension candidates. Maximal degree in co-relation 22063. Up to 632 conditions per place. [2022-07-21 09:06:52,140 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 361 selfloop transitions, 665 changer transitions 12/1080 dead transitions. [2022-07-21 09:06:52,141 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 578 places, 1080 transitions, 21702 flow [2022-07-21 09:06:52,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-07-21 09:06:52,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2022-07-21 09:06:52,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 3584 transitions. [2022-07-21 09:06:52,157 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6292134831460674 [2022-07-21 09:06:52,158 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 3584 transitions. [2022-07-21 09:06:52,158 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 3584 transitions. [2022-07-21 09:06:52,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:06:52,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 3584 transitions. [2022-07-21 09:06:52,161 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 56.0) internal successors, (3584), 64 states have internal predecessors, (3584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:52,167 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 89.0) internal successors, (5785), 65 states have internal predecessors, (5785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:52,167 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 89.0) internal successors, (5785), 65 states have internal predecessors, (5785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:52,168 INFO L186 Difference]: Start difference. First operand has 522 places, 850 transitions, 15829 flow. Second operand 64 states and 3584 transitions. [2022-07-21 09:06:52,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 578 places, 1080 transitions, 21702 flow [2022-07-21 09:06:52,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 553 places, 1080 transitions, 20303 flow, removed 588 selfloop flow, removed 25 redundant places. [2022-07-21 09:06:52,511 INFO L242 Difference]: Finished difference. Result has 561 places, 983 transitions, 19489 flow [2022-07-21 09:06:52,512 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=15001, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=849, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=539, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=19489, PETRI_PLACES=561, PETRI_TRANSITIONS=983} [2022-07-21 09:06:52,512 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 482 predicate places. [2022-07-21 09:06:52,512 INFO L495 AbstractCegarLoop]: Abstraction has has 561 places, 983 transitions, 19489 flow [2022-07-21 09:06:52,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 53.65714285714286) internal successors, (1878), 35 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:52,513 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:06:52,513 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:06:52,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-21 09:06:52,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-21 09:06:52,717 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:06:52,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:06:52,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1086203295, now seen corresponding path program 11 times [2022-07-21 09:06:52,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:06:52,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536194544] [2022-07-21 09:06:52,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:06:52,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:06:52,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:06:52,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:52,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:06:52,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536194544] [2022-07-21 09:06:52,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536194544] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:06:52,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014766257] [2022-07-21 09:06:52,978 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 09:06:52,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:06:52,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:06:52,995 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:06:53,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-21 09:06:53,058 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 09:06:53,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:06:53,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-21 09:06:53,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:06:53,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:53,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:06:53,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:53,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014766257] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:06:53,831 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:06:53,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2022-07-21 09:06:53,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57544111] [2022-07-21 09:06:53,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:06:53,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-21 09:06:53,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:06:53,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-21 09:06:53,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1106, Unknown=0, NotChecked=0, Total=1332 [2022-07-21 09:06:53,834 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-07-21 09:06:53,835 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 561 places, 983 transitions, 19489 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:53,835 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:06:53,835 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-07-21 09:06:53,835 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:06:55,460 INFO L129 PetriNetUnfolder]: 937/3208 cut-off events. [2022-07-21 09:06:55,461 INFO L130 PetriNetUnfolder]: For 55886/55902 co-relation queries the response was YES. [2022-07-21 09:06:55,484 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22512 conditions, 3208 events. 937/3208 cut-off events. For 55886/55902 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 30232 event pairs, 81 based on Foata normal form. 5/3193 useless extension candidates. Maximal degree in co-relation 22411. Up to 1229 conditions per place. [2022-07-21 09:06:55,498 INFO L132 encePairwiseOnDemand]: 69/89 looper letters, 421 selfloop transitions, 547 changer transitions 12/1022 dead transitions. [2022-07-21 09:06:55,498 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 585 places, 1022 transitions, 21912 flow [2022-07-21 09:06:55,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-21 09:06:55,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-07-21 09:06:55,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1878 transitions. [2022-07-21 09:06:55,500 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6206212822207535 [2022-07-21 09:06:55,500 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1878 transitions. [2022-07-21 09:06:55,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1878 transitions. [2022-07-21 09:06:55,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:06:55,501 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1878 transitions. [2022-07-21 09:06:55,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 55.23529411764706) internal successors, (1878), 34 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:55,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 89.0) internal successors, (3115), 35 states have internal predecessors, (3115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:55,504 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 89.0) internal successors, (3115), 35 states have internal predecessors, (3115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:55,504 INFO L186 Difference]: Start difference. First operand has 561 places, 983 transitions, 19489 flow. Second operand 34 states and 1878 transitions. [2022-07-21 09:06:55,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 585 places, 1022 transitions, 21912 flow [2022-07-21 09:06:55,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 553 places, 1022 transitions, 21461 flow, removed 88 selfloop flow, removed 32 redundant places. [2022-07-21 09:06:55,856 INFO L242 Difference]: Finished difference. Result has 566 places, 993 transitions, 20815 flow [2022-07-21 09:06:55,857 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=19045, PETRI_DIFFERENCE_MINUEND_PLACES=520, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=983, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=537, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=20815, PETRI_PLACES=566, PETRI_TRANSITIONS=993} [2022-07-21 09:06:55,857 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 487 predicate places. [2022-07-21 09:06:55,858 INFO L495 AbstractCegarLoop]: Abstraction has has 566 places, 993 transitions, 20815 flow [2022-07-21 09:06:55,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:55,858 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:06:55,858 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:06:55,875 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-07-21 09:06:56,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-21 09:06:56,064 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:06:56,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:06:56,065 INFO L85 PathProgramCache]: Analyzing trace with hash -998248241, now seen corresponding path program 12 times [2022-07-21 09:06:56,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:06:56,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865727028] [2022-07-21 09:06:56,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:06:56,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:06:56,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:06:56,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:56,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:06:56,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865727028] [2022-07-21 09:06:56,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865727028] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:06:56,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400026171] [2022-07-21 09:06:56,257 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 09:06:56,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:06:56,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:06:56,259 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:06:56,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-21 09:06:56,366 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-07-21 09:06:56,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:06:56,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-21 09:06:56,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:06:56,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:56,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:06:57,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:57,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400026171] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:06:57,119 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:06:57,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2022-07-21 09:06:57,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677042789] [2022-07-21 09:06:57,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:06:57,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-21 09:06:57,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:06:57,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-21 09:06:57,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=1104, Unknown=0, NotChecked=0, Total=1332 [2022-07-21 09:06:57,124 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-07-21 09:06:57,125 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 566 places, 993 transitions, 20815 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:57,125 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:06:57,125 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-07-21 09:06:57,125 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:06:59,225 INFO L129 PetriNetUnfolder]: 941/3563 cut-off events. [2022-07-21 09:06:59,226 INFO L130 PetriNetUnfolder]: For 63398/63414 co-relation queries the response was YES. [2022-07-21 09:06:59,252 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24454 conditions, 3563 events. 941/3563 cut-off events. For 63398/63414 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 35582 event pairs, 65 based on Foata normal form. 5/3563 useless extension candidates. Maximal degree in co-relation 24343. Up to 1221 conditions per place. [2022-07-21 09:06:59,266 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 397 selfloop transitions, 588 changer transitions 12/1039 dead transitions. [2022-07-21 09:06:59,267 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 598 places, 1039 transitions, 23359 flow [2022-07-21 09:06:59,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-21 09:06:59,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-07-21 09:06:59,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2158 transitions. [2022-07-21 09:06:59,268 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6217228464419475 [2022-07-21 09:06:59,268 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2158 transitions. [2022-07-21 09:06:59,269 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2158 transitions. [2022-07-21 09:06:59,269 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:06:59,269 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2158 transitions. [2022-07-21 09:06:59,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 55.333333333333336) internal successors, (2158), 39 states have internal predecessors, (2158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:59,273 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 89.0) internal successors, (3560), 40 states have internal predecessors, (3560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:59,273 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 89.0) internal successors, (3560), 40 states have internal predecessors, (3560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:59,273 INFO L186 Difference]: Start difference. First operand has 566 places, 993 transitions, 20815 flow. Second operand 39 states and 2158 transitions. [2022-07-21 09:06:59,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 598 places, 1039 transitions, 23359 flow [2022-07-21 09:06:59,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 578 places, 1039 transitions, 22889 flow, removed 18 selfloop flow, removed 20 redundant places. [2022-07-21 09:06:59,655 INFO L242 Difference]: Finished difference. Result has 589 places, 1003 transitions, 22368 flow [2022-07-21 09:06:59,656 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=20352, PETRI_DIFFERENCE_MINUEND_PLACES=540, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=992, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=575, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=22368, PETRI_PLACES=589, PETRI_TRANSITIONS=1003} [2022-07-21 09:06:59,656 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 510 predicate places. [2022-07-21 09:06:59,713 INFO L495 AbstractCegarLoop]: Abstraction has has 589 places, 1003 transitions, 22368 flow [2022-07-21 09:06:59,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:59,714 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:06:59,714 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:06:59,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-21 09:06:59,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:06:59,915 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:06:59,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:06:59,915 INFO L85 PathProgramCache]: Analyzing trace with hash -54177703, now seen corresponding path program 13 times [2022-07-21 09:06:59,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:06:59,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248615104] [2022-07-21 09:06:59,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:06:59,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:06:59,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:07:00,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:07:00,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:07:00,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248615104] [2022-07-21 09:07:00,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248615104] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:07:00,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909627024] [2022-07-21 09:07:00,157 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 09:07:00,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:07:00,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:07:00,158 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:07:00,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-21 09:07:00,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:07:00,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-21 09:07:00,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:07:00,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:07:00,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:07:01,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:07:01,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909627024] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:07:01,022 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:07:01,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2022-07-21 09:07:01,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914144975] [2022-07-21 09:07:01,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:07:01,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-21 09:07:01,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:07:01,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-21 09:07:01,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1117, Unknown=0, NotChecked=0, Total=1332 [2022-07-21 09:07:01,025 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-07-21 09:07:01,026 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 589 places, 1003 transitions, 22368 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:01,026 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:07:01,026 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-07-21 09:07:01,026 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:07:03,020 INFO L129 PetriNetUnfolder]: 941/3561 cut-off events. [2022-07-21 09:07:03,020 INFO L130 PetriNetUnfolder]: For 71448/71459 co-relation queries the response was YES. [2022-07-21 09:07:03,048 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25667 conditions, 3561 events. 941/3561 cut-off events. For 71448/71459 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 35543 event pairs, 110 based on Foata normal form. 5/3541 useless extension candidates. Maximal degree in co-relation 25550. Up to 1194 conditions per place. [2022-07-21 09:07:03,062 INFO L132 encePairwiseOnDemand]: 69/89 looper letters, 409 selfloop transitions, 581 changer transitions 12/1044 dead transitions. [2022-07-21 09:07:03,063 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 617 places, 1044 transitions, 24884 flow [2022-07-21 09:07:03,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-21 09:07:03,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-07-21 09:07:03,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2041 transitions. [2022-07-21 09:07:03,064 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6197995748557547 [2022-07-21 09:07:03,064 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2041 transitions. [2022-07-21 09:07:03,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2041 transitions. [2022-07-21 09:07:03,065 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:07:03,065 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2041 transitions. [2022-07-21 09:07:03,131 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 55.16216216216216) internal successors, (2041), 37 states have internal predecessors, (2041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:03,132 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 89.0) internal successors, (3382), 38 states have internal predecessors, (3382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:03,132 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 89.0) internal successors, (3382), 38 states have internal predecessors, (3382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:03,132 INFO L186 Difference]: Start difference. First operand has 589 places, 1003 transitions, 22368 flow. Second operand 37 states and 2041 transitions. [2022-07-21 09:07:03,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 617 places, 1044 transitions, 24884 flow [2022-07-21 09:07:03,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 595 places, 1044 transitions, 24711 flow, removed 34 selfloop flow, removed 22 redundant places. [2022-07-21 09:07:03,566 INFO L242 Difference]: Finished difference. Result has 608 places, 1016 transitions, 24077 flow [2022-07-21 09:07:03,567 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=22212, PETRI_DIFFERENCE_MINUEND_PLACES=559, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1003, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=568, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=24077, PETRI_PLACES=608, PETRI_TRANSITIONS=1016} [2022-07-21 09:07:03,567 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 529 predicate places. [2022-07-21 09:07:03,567 INFO L495 AbstractCegarLoop]: Abstraction has has 608 places, 1016 transitions, 24077 flow [2022-07-21 09:07:03,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:03,568 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:07:03,568 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:07:03,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-21 09:07:03,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2022-07-21 09:07:03,780 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:07:03,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:07:03,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1848370869, now seen corresponding path program 14 times [2022-07-21 09:07:03,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:07:03,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431621878] [2022-07-21 09:07:03,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:07:03,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:07:03,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:07:03,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:07:03,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:07:03,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431621878] [2022-07-21 09:07:03,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431621878] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:07:03,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981005767] [2022-07-21 09:07:03,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 09:07:03,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:07:03,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:07:03,995 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:07:03,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-21 09:07:04,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 09:07:04,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:07:04,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-21 09:07:04,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:07:04,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:07:04,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:07:04,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:07:04,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981005767] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:07:04,745 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:07:04,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2022-07-21 09:07:04,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369471543] [2022-07-21 09:07:04,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:07:04,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-21 09:07:04,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:07:04,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-21 09:07:04,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1108, Unknown=0, NotChecked=0, Total=1332 [2022-07-21 09:07:04,748 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-07-21 09:07:04,749 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 608 places, 1016 transitions, 24077 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:04,750 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:07:04,750 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-07-21 09:07:04,750 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:07:06,560 INFO L129 PetriNetUnfolder]: 943/3672 cut-off events. [2022-07-21 09:07:06,560 INFO L130 PetriNetUnfolder]: For 83048/83079 co-relation queries the response was YES. [2022-07-21 09:07:06,594 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27053 conditions, 3672 events. 943/3672 cut-off events. For 83048/83079 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 37023 event pairs, 126 based on Foata normal form. 5/3670 useless extension candidates. Maximal degree in co-relation 26927. Up to 1425 conditions per place. [2022-07-21 09:07:06,611 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 401 selfloop transitions, 597 changer transitions 6/1046 dead transitions. [2022-07-21 09:07:06,612 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 633 places, 1046 transitions, 26512 flow [2022-07-21 09:07:06,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-21 09:07:06,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-07-21 09:07:06,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1775 transitions. [2022-07-21 09:07:06,614 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6232443820224719 [2022-07-21 09:07:06,614 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1775 transitions. [2022-07-21 09:07:06,614 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1775 transitions. [2022-07-21 09:07:06,614 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:07:06,614 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1775 transitions. [2022-07-21 09:07:06,616 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 55.46875) internal successors, (1775), 32 states have internal predecessors, (1775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:06,638 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 89.0) internal successors, (2937), 33 states have internal predecessors, (2937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:06,638 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 89.0) internal successors, (2937), 33 states have internal predecessors, (2937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:06,638 INFO L186 Difference]: Start difference. First operand has 608 places, 1016 transitions, 24077 flow. Second operand 32 states and 1775 transitions. [2022-07-21 09:07:06,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 633 places, 1046 transitions, 26512 flow [2022-07-21 09:07:07,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 612 places, 1046 transitions, 25991 flow, removed 31 selfloop flow, removed 21 redundant places. [2022-07-21 09:07:07,211 INFO L242 Difference]: Finished difference. Result has 619 places, 1024 transitions, 25538 flow [2022-07-21 09:07:07,212 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=23569, PETRI_DIFFERENCE_MINUEND_PLACES=581, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1016, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=590, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=25538, PETRI_PLACES=619, PETRI_TRANSITIONS=1024} [2022-07-21 09:07:07,212 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 540 predicate places. [2022-07-21 09:07:07,212 INFO L495 AbstractCegarLoop]: Abstraction has has 619 places, 1024 transitions, 25538 flow [2022-07-21 09:07:07,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:07,213 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:07:07,213 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:07:07,229 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-07-21 09:07:07,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:07:07,427 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:07:07,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:07:07,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1050767011, now seen corresponding path program 15 times [2022-07-21 09:07:07,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:07:07,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656668897] [2022-07-21 09:07:07,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:07:07,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:07:07,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:07:07,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:07:07,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:07:07,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656668897] [2022-07-21 09:07:07,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656668897] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:07:07,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215986974] [2022-07-21 09:07:07,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 09:07:07,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:07:07,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:07:07,705 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:07:07,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-21 09:07:07,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-21 09:07:07,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:07:07,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-21 09:07:07,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:07:08,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:07:08,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:07:08,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:07:08,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215986974] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:07:08,523 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:07:08,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2022-07-21 09:07:08,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438063107] [2022-07-21 09:07:08,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:07:08,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-21 09:07:08,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:07:08,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-21 09:07:08,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1133, Unknown=0, NotChecked=0, Total=1332 [2022-07-21 09:07:08,525 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-07-21 09:07:08,526 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 619 places, 1024 transitions, 25538 flow. Second operand has 37 states, 37 states have (on average 53.62162162162162) internal successors, (1984), 37 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:08,526 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:07:08,526 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-07-21 09:07:08,526 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:07:11,061 INFO L129 PetriNetUnfolder]: 948/3631 cut-off events. [2022-07-21 09:07:11,062 INFO L130 PetriNetUnfolder]: For 90876/90905 co-relation queries the response was YES. [2022-07-21 09:07:11,092 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28227 conditions, 3631 events. 948/3631 cut-off events. For 90876/90905 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 36517 event pairs, 58 based on Foata normal form. 5/3631 useless extension candidates. Maximal degree in co-relation 28100. Up to 1109 conditions per place. [2022-07-21 09:07:11,108 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 386 selfloop transitions, 679 changer transitions 6/1113 dead transitions. [2022-07-21 09:07:11,108 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 665 places, 1113 transitions, 29047 flow [2022-07-21 09:07:11,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-07-21 09:07:11,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2022-07-21 09:07:11,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 2789 transitions. [2022-07-21 09:07:11,110 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6267415730337078 [2022-07-21 09:07:11,111 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 2789 transitions. [2022-07-21 09:07:11,111 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 2789 transitions. [2022-07-21 09:07:11,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:07:11,111 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 2789 transitions. [2022-07-21 09:07:11,114 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 55.78) internal successors, (2789), 50 states have internal predecessors, (2789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:11,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 89.0) internal successors, (4539), 51 states have internal predecessors, (4539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:11,116 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 89.0) internal successors, (4539), 51 states have internal predecessors, (4539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:11,116 INFO L186 Difference]: Start difference. First operand has 619 places, 1024 transitions, 25538 flow. Second operand 50 states and 2789 transitions. [2022-07-21 09:07:11,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 665 places, 1113 transitions, 29047 flow [2022-07-21 09:07:11,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 645 places, 1113 transitions, 28854 flow, removed 23 selfloop flow, removed 20 redundant places. [2022-07-21 09:07:11,714 INFO L242 Difference]: Finished difference. Result has 654 places, 1053 transitions, 27975 flow [2022-07-21 09:07:11,715 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=25350, PETRI_DIFFERENCE_MINUEND_PLACES=596, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1024, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=651, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=27975, PETRI_PLACES=654, PETRI_TRANSITIONS=1053} [2022-07-21 09:07:11,715 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 575 predicate places. [2022-07-21 09:07:11,715 INFO L495 AbstractCegarLoop]: Abstraction has has 654 places, 1053 transitions, 27975 flow [2022-07-21 09:07:11,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.62162162162162) internal successors, (1984), 37 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:11,716 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:07:11,716 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:07:11,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-21 09:07:11,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:07:11,935 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:07:11,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:07:11,936 INFO L85 PathProgramCache]: Analyzing trace with hash -280113973, now seen corresponding path program 16 times [2022-07-21 09:07:11,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:07:11,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603396087] [2022-07-21 09:07:11,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:07:11,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:07:11,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:07:12,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:07:12,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:07:12,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603396087] [2022-07-21 09:07:12,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603396087] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:07:12,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590480466] [2022-07-21 09:07:12,140 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 09:07:12,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:07:12,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:07:12,141 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:07:12,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-21 09:07:12,192 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 09:07:12,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:07:12,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-21 09:07:12,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:07:12,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:07:12,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:07:13,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:07:13,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590480466] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:07:13,046 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:07:13,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2022-07-21 09:07:13,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654579580] [2022-07-21 09:07:13,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:07:13,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-21 09:07:13,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:07:13,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-21 09:07:13,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1142, Unknown=0, NotChecked=0, Total=1332 [2022-07-21 09:07:13,048 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-07-21 09:07:13,049 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 654 places, 1053 transitions, 27975 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:13,049 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:07:13,049 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-07-21 09:07:13,050 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:07:17,192 INFO L129 PetriNetUnfolder]: 974/3757 cut-off events. [2022-07-21 09:07:17,192 INFO L130 PetriNetUnfolder]: For 107919/107935 co-relation queries the response was YES. [2022-07-21 09:07:17,231 INFO L84 FinitePrefix]: Finished finitePrefix Result has 30543 conditions, 3757 events. 974/3757 cut-off events. For 107919/107935 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 38146 event pairs, 88 based on Foata normal form. 4/3755 useless extension candidates. Maximal degree in co-relation 30410. Up to 1051 conditions per place. [2022-07-21 09:07:17,250 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 313 selfloop transitions, 822 changer transitions 12/1189 dead transitions. [2022-07-21 09:07:17,250 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 737 places, 1189 transitions, 32469 flow [2022-07-21 09:07:17,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-07-21 09:07:17,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2022-07-21 09:07:17,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 4796 transitions. [2022-07-21 09:07:17,254 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6193981660854966 [2022-07-21 09:07:17,254 INFO L72 ComplementDD]: Start complementDD. Operand 87 states and 4796 transitions. [2022-07-21 09:07:17,254 INFO L73 IsDeterministic]: Start isDeterministic. Operand 87 states and 4796 transitions. [2022-07-21 09:07:17,255 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:07:17,255 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 87 states and 4796 transitions. [2022-07-21 09:07:17,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 88 states, 87 states have (on average 55.12643678160919) internal successors, (4796), 87 states have internal predecessors, (4796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:17,262 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 88 states, 88 states have (on average 89.0) internal successors, (7832), 88 states have internal predecessors, (7832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:17,262 INFO L81 ComplementDD]: Finished complementDD. Result has 88 states, 88 states have (on average 89.0) internal successors, (7832), 88 states have internal predecessors, (7832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:17,262 INFO L186 Difference]: Start difference. First operand has 654 places, 1053 transitions, 27975 flow. Second operand 87 states and 4796 transitions. [2022-07-21 09:07:17,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 737 places, 1189 transitions, 32469 flow [2022-07-21 09:07:17,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 717 places, 1189 transitions, 32059 flow, removed 81 selfloop flow, removed 20 redundant places. [2022-07-21 09:07:17,955 INFO L242 Difference]: Finished difference. Result has 734 places, 1117 transitions, 31519 flow [2022-07-21 09:07:17,956 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=27617, PETRI_DIFFERENCE_MINUEND_PLACES=631, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1053, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=766, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=87, PETRI_FLOW=31519, PETRI_PLACES=734, PETRI_TRANSITIONS=1117} [2022-07-21 09:07:17,957 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 655 predicate places. [2022-07-21 09:07:17,957 INFO L495 AbstractCegarLoop]: Abstraction has has 734 places, 1117 transitions, 31519 flow [2022-07-21 09:07:17,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:17,957 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:07:17,957 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:07:17,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-21 09:07:18,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-07-21 09:07:18,172 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:07:18,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:07:18,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1771949071, now seen corresponding path program 17 times [2022-07-21 09:07:18,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:07:18,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930553706] [2022-07-21 09:07:18,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:07:18,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:07:18,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:07:18,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:07:18,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:07:18,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930553706] [2022-07-21 09:07:18,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930553706] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:07:18,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196644919] [2022-07-21 09:07:18,403 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 09:07:18,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:07:18,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:07:18,404 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:07:18,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-21 09:07:18,458 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 09:07:18,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:07:18,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-21 09:07:18,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:07:18,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:07:18,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:07:19,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:07:19,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196644919] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:07:19,024 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:07:19,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 35 [2022-07-21 09:07:19,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107513612] [2022-07-21 09:07:19,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:07:19,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-21 09:07:19,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:07:19,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-21 09:07:19,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1000, Unknown=0, NotChecked=0, Total=1190 [2022-07-21 09:07:19,027 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-07-21 09:07:19,028 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 734 places, 1117 transitions, 31519 flow. Second operand has 35 states, 35 states have (on average 53.68571428571428) internal successors, (1879), 35 states have internal predecessors, (1879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:19,028 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:07:19,028 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-07-21 09:07:19,028 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:07:20,943 INFO L129 PetriNetUnfolder]: 974/3694 cut-off events. [2022-07-21 09:07:20,944 INFO L130 PetriNetUnfolder]: For 131119/131137 co-relation queries the response was YES. [2022-07-21 09:07:20,980 INFO L84 FinitePrefix]: Finished finitePrefix Result has 32931 conditions, 3694 events. 974/3694 cut-off events. For 131119/131137 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 37307 event pairs, 103 based on Foata normal form. 3/3673 useless extension candidates. Maximal degree in co-relation 32785. Up to 1272 conditions per place. [2022-07-21 09:07:20,997 INFO L132 encePairwiseOnDemand]: 69/89 looper letters, 504 selfloop transitions, 591 changer transitions 6/1143 dead transitions. [2022-07-21 09:07:20,997 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 753 places, 1143 transitions, 34130 flow [2022-07-21 09:07:20,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-21 09:07:20,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-07-21 09:07:20,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1445 transitions. [2022-07-21 09:07:20,999 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6244598098530683 [2022-07-21 09:07:20,999 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1445 transitions. [2022-07-21 09:07:20,999 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1445 transitions. [2022-07-21 09:07:21,000 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:07:21,000 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1445 transitions. [2022-07-21 09:07:21,001 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 55.57692307692308) internal successors, (1445), 26 states have internal predecessors, (1445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:21,002 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 89.0) internal successors, (2403), 27 states have internal predecessors, (2403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:21,002 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 89.0) internal successors, (2403), 27 states have internal predecessors, (2403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:21,002 INFO L186 Difference]: Start difference. First operand has 734 places, 1117 transitions, 31519 flow. Second operand 26 states and 1445 transitions. [2022-07-21 09:07:21,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 753 places, 1143 transitions, 34130 flow [2022-07-21 09:07:21,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 709 places, 1143 transitions, 32991 flow, removed 240 selfloop flow, removed 44 redundant places. [2022-07-21 09:07:21,888 INFO L242 Difference]: Finished difference. Result has 716 places, 1123 transitions, 32239 flow [2022-07-21 09:07:21,889 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=30406, PETRI_DIFFERENCE_MINUEND_PLACES=684, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=585, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=32239, PETRI_PLACES=716, PETRI_TRANSITIONS=1123} [2022-07-21 09:07:21,889 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 637 predicate places. [2022-07-21 09:07:21,889 INFO L495 AbstractCegarLoop]: Abstraction has has 716 places, 1123 transitions, 32239 flow [2022-07-21 09:07:21,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 53.68571428571428) internal successors, (1879), 35 states have internal predecessors, (1879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:21,890 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:07:21,890 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:07:21,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-21 09:07:22,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:07:22,106 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:07:22,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:07:22,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1738791515, now seen corresponding path program 18 times [2022-07-21 09:07:22,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:07:22,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417366570] [2022-07-21 09:07:22,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:07:22,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:07:22,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:07:22,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:07:22,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:07:22,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417366570] [2022-07-21 09:07:22,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417366570] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:07:22,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076035469] [2022-07-21 09:07:22,370 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 09:07:22,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:07:22,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:07:22,371 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:07:22,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-21 09:07:22,422 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-07-21 09:07:22,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:07:22,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-21 09:07:22,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:07:22,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:07:22,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:07:23,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:07:23,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076035469] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:07:23,142 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:07:23,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2022-07-21 09:07:23,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945289413] [2022-07-21 09:07:23,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:07:23,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-21 09:07:23,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:07:23,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-21 09:07:23,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1131, Unknown=0, NotChecked=0, Total=1332 [2022-07-21 09:07:23,151 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-07-21 09:07:23,152 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 716 places, 1123 transitions, 32239 flow. Second operand has 37 states, 37 states have (on average 53.62162162162162) internal successors, (1984), 37 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:23,152 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:07:23,152 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-07-21 09:07:23,152 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:07:28,160 INFO L129 PetriNetUnfolder]: 1038/3918 cut-off events. [2022-07-21 09:07:28,160 INFO L130 PetriNetUnfolder]: For 147623/147654 co-relation queries the response was YES. [2022-07-21 09:07:28,196 INFO L84 FinitePrefix]: Finished finitePrefix Result has 35029 conditions, 3918 events. 1038/3918 cut-off events. For 147623/147654 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 39885 event pairs, 75 based on Foata normal form. 5/3917 useless extension candidates. Maximal degree in co-relation 34886. Up to 991 conditions per place. [2022-07-21 09:07:28,215 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 328 selfloop transitions, 912 changer transitions 6/1288 dead transitions. [2022-07-21 09:07:28,215 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 809 places, 1288 transitions, 37868 flow [2022-07-21 09:07:28,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-07-21 09:07:28,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2022-07-21 09:07:28,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 5355 transitions. [2022-07-21 09:07:28,218 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6202942198540484 [2022-07-21 09:07:28,218 INFO L72 ComplementDD]: Start complementDD. Operand 97 states and 5355 transitions. [2022-07-21 09:07:28,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 97 states and 5355 transitions. [2022-07-21 09:07:28,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:07:28,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 97 states and 5355 transitions. [2022-07-21 09:07:28,223 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 98 states, 97 states have (on average 55.20618556701031) internal successors, (5355), 97 states have internal predecessors, (5355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:28,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 98 states, 98 states have (on average 89.0) internal successors, (8722), 98 states have internal predecessors, (8722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:28,227 INFO L81 ComplementDD]: Finished complementDD. Result has 98 states, 98 states have (on average 89.0) internal successors, (8722), 98 states have internal predecessors, (8722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:28,227 INFO L186 Difference]: Start difference. First operand has 716 places, 1123 transitions, 32239 flow. Second operand 97 states and 5355 transitions. [2022-07-21 09:07:28,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 809 places, 1288 transitions, 37868 flow [2022-07-21 09:07:29,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 792 places, 1288 transitions, 37287 flow, removed 29 selfloop flow, removed 17 redundant places. [2022-07-21 09:07:29,195 INFO L242 Difference]: Finished difference. Result has 803 places, 1209 transitions, 36217 flow [2022-07-21 09:07:29,196 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=31704, PETRI_DIFFERENCE_MINUEND_PLACES=696, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=831, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=97, PETRI_FLOW=36217, PETRI_PLACES=803, PETRI_TRANSITIONS=1209} [2022-07-21 09:07:29,196 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 724 predicate places. [2022-07-21 09:07:29,196 INFO L495 AbstractCegarLoop]: Abstraction has has 803 places, 1209 transitions, 36217 flow [2022-07-21 09:07:29,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.62162162162162) internal successors, (1984), 37 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:29,197 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:07:29,197 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:07:29,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-21 09:07:29,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:07:29,413 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:07:29,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:07:29,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1738018965, now seen corresponding path program 19 times [2022-07-21 09:07:29,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:07:29,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058726240] [2022-07-21 09:07:29,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:07:29,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:07:29,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:07:29,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:07:29,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:07:29,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058726240] [2022-07-21 09:07:29,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058726240] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:07:29,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851698366] [2022-07-21 09:07:29,691 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 09:07:29,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:07:29,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:07:29,693 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:07:29,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-21 09:07:29,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:07:29,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-21 09:07:29,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:07:30,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:07:30,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:07:30,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:07:30,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851698366] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:07:30,528 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:07:30,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2022-07-21 09:07:30,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384752298] [2022-07-21 09:07:30,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:07:30,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-21 09:07:30,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:07:30,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-21 09:07:30,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1129, Unknown=0, NotChecked=0, Total=1332 [2022-07-21 09:07:30,530 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-07-21 09:07:30,532 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 803 places, 1209 transitions, 36217 flow. Second operand has 37 states, 37 states have (on average 53.62162162162162) internal successors, (1984), 37 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:30,532 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:07:30,532 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-07-21 09:07:30,532 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:07:33,972 INFO L129 PetriNetUnfolder]: 1258/4504 cut-off events. [2022-07-21 09:07:33,973 INFO L130 PetriNetUnfolder]: For 182484/182502 co-relation queries the response was YES. [2022-07-21 09:07:34,022 INFO L84 FinitePrefix]: Finished finitePrefix Result has 41620 conditions, 4504 events. 1258/4504 cut-off events. For 182484/182502 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 46297 event pairs, 108 based on Foata normal form. 3/4502 useless extension candidates. Maximal degree in co-relation 41468. Up to 1065 conditions per place. [2022-07-21 09:07:34,045 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 466 selfloop transitions, 955 changer transitions 6/1469 dead transitions. [2022-07-21 09:07:34,045 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 858 places, 1469 transitions, 44672 flow [2022-07-21 09:07:34,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-07-21 09:07:34,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2022-07-21 09:07:34,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 3541 transitions. [2022-07-21 09:07:34,048 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6315320135544855 [2022-07-21 09:07:34,048 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 3541 transitions. [2022-07-21 09:07:34,048 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 3541 transitions. [2022-07-21 09:07:34,048 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:07:34,048 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 3541 transitions. [2022-07-21 09:07:34,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 56.20634920634921) internal successors, (3541), 63 states have internal predecessors, (3541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:34,054 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 89.0) internal successors, (5696), 64 states have internal predecessors, (5696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:34,054 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 89.0) internal successors, (5696), 64 states have internal predecessors, (5696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:34,054 INFO L186 Difference]: Start difference. First operand has 803 places, 1209 transitions, 36217 flow. Second operand 63 states and 3541 transitions. [2022-07-21 09:07:34,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 858 places, 1469 transitions, 44672 flow [2022-07-21 09:07:35,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 810 places, 1469 transitions, 43816 flow, removed 213 selfloop flow, removed 48 redundant places. [2022-07-21 09:07:35,274 INFO L242 Difference]: Finished difference. Result has 821 places, 1376 transitions, 42784 flow [2022-07-21 09:07:35,276 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=35381, PETRI_DIFFERENCE_MINUEND_PLACES=748, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=797, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=42784, PETRI_PLACES=821, PETRI_TRANSITIONS=1376} [2022-07-21 09:07:35,276 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 742 predicate places. [2022-07-21 09:07:35,276 INFO L495 AbstractCegarLoop]: Abstraction has has 821 places, 1376 transitions, 42784 flow [2022-07-21 09:07:35,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.62162162162162) internal successors, (1984), 37 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:35,277 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:07:35,277 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:07:35,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-21 09:07:35,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:07:35,496 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:07:35,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:07:35,496 INFO L85 PathProgramCache]: Analyzing trace with hash -958803233, now seen corresponding path program 1 times [2022-07-21 09:07:35,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:07:35,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291338843] [2022-07-21 09:07:35,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:07:35,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:07:35,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:07:35,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:07:35,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:07:35,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291338843] [2022-07-21 09:07:35,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291338843] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:07:35,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354108563] [2022-07-21 09:07:35,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:07:35,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:07:35,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:07:35,673 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:07:35,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-21 09:07:35,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:07:35,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-21 09:07:35,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:07:36,038 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:07:36,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:07:36,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:07:36,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354108563] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:07:36,296 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:07:36,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 37 [2022-07-21 09:07:36,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033897936] [2022-07-21 09:07:36,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:07:36,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-21 09:07:36,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:07:36,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-21 09:07:36,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1174, Unknown=0, NotChecked=0, Total=1332 [2022-07-21 09:07:36,298 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 89 [2022-07-21 09:07:36,299 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 821 places, 1376 transitions, 42784 flow. Second operand has 37 states, 37 states have (on average 52.62162162162162) internal successors, (1947), 37 states have internal predecessors, (1947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:36,299 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:07:36,299 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 89 [2022-07-21 09:07:36,299 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:07:39,680 INFO L129 PetriNetUnfolder]: 1475/4935 cut-off events. [2022-07-21 09:07:39,680 INFO L130 PetriNetUnfolder]: For 217916/217944 co-relation queries the response was YES. [2022-07-21 09:07:39,739 INFO L84 FinitePrefix]: Finished finitePrefix Result has 48131 conditions, 4935 events. 1475/4935 cut-off events. For 217916/217944 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 50390 event pairs, 214 based on Foata normal form. 14/4927 useless extension candidates. Maximal degree in co-relation 47970. Up to 1108 conditions per place. [2022-07-21 09:07:39,765 INFO L132 encePairwiseOnDemand]: 71/89 looper letters, 566 selfloop transitions, 909 changer transitions 27/1543 dead transitions. [2022-07-21 09:07:39,765 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 867 places, 1543 transitions, 49144 flow [2022-07-21 09:07:39,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-07-21 09:07:39,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2022-07-21 09:07:39,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 3010 transitions. [2022-07-21 09:07:39,767 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.626300457761132 [2022-07-21 09:07:39,767 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 3010 transitions. [2022-07-21 09:07:39,768 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 3010 transitions. [2022-07-21 09:07:39,768 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:07:39,768 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 3010 transitions. [2022-07-21 09:07:39,770 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 55.74074074074074) internal successors, (3010), 54 states have internal predecessors, (3010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:39,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 89.0) internal successors, (4895), 55 states have internal predecessors, (4895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:39,773 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 89.0) internal successors, (4895), 55 states have internal predecessors, (4895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:39,773 INFO L186 Difference]: Start difference. First operand has 821 places, 1376 transitions, 42784 flow. Second operand 54 states and 3010 transitions. [2022-07-21 09:07:39,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 867 places, 1543 transitions, 49144 flow [2022-07-21 09:07:41,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 837 places, 1543 transitions, 47864 flow, removed 182 selfloop flow, removed 30 redundant places. [2022-07-21 09:07:41,264 INFO L242 Difference]: Finished difference. Result has 860 places, 1424 transitions, 45757 flow [2022-07-21 09:07:41,265 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=41598, PETRI_DIFFERENCE_MINUEND_PLACES=784, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=858, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=45757, PETRI_PLACES=860, PETRI_TRANSITIONS=1424} [2022-07-21 09:07:41,266 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 781 predicate places. [2022-07-21 09:07:41,266 INFO L495 AbstractCegarLoop]: Abstraction has has 860 places, 1424 transitions, 45757 flow [2022-07-21 09:07:41,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 52.62162162162162) internal successors, (1947), 37 states have internal predecessors, (1947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:41,266 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:07:41,267 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:07:41,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-21 09:07:41,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-21 09:07:41,484 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:07:41,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:07:41,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1067754541, now seen corresponding path program 20 times [2022-07-21 09:07:41,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:07:41,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755573979] [2022-07-21 09:07:41,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:07:41,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:07:41,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:07:41,780 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:07:41,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:07:41,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755573979] [2022-07-21 09:07:41,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755573979] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:07:41,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091354544] [2022-07-21 09:07:41,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 09:07:41,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:07:41,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:07:41,788 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:07:41,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-21 09:07:41,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 09:07:41,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:07:41,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-21 09:07:41,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:07:42,329 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:07:42,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:07:42,857 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:07:42,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091354544] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:07:42,858 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:07:42,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 46 [2022-07-21 09:07:42,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343552830] [2022-07-21 09:07:42,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:07:42,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-21 09:07:42,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:07:42,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-21 09:07:42,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1849, Unknown=0, NotChecked=0, Total=2070 [2022-07-21 09:07:42,860 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-07-21 09:07:42,861 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 860 places, 1424 transitions, 45757 flow. Second operand has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:42,861 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:07:42,861 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-07-21 09:07:42,861 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:07:47,278 INFO L129 PetriNetUnfolder]: 1422/4976 cut-off events. [2022-07-21 09:07:47,278 INFO L130 PetriNetUnfolder]: For 249357/249379 co-relation queries the response was YES. [2022-07-21 09:07:47,351 INFO L84 FinitePrefix]: Finished finitePrefix Result has 51987 conditions, 4976 events. 1422/4976 cut-off events. For 249357/249379 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 51107 event pairs, 81 based on Foata normal form. 32/4987 useless extension candidates. Maximal degree in co-relation 51810. Up to 786 conditions per place. [2022-07-21 09:07:47,379 INFO L132 encePairwiseOnDemand]: 69/89 looper letters, 479 selfloop transitions, 1093 changer transitions 18/1633 dead transitions. [2022-07-21 09:07:47,379 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 919 places, 1633 transitions, 55107 flow [2022-07-21 09:07:47,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-07-21 09:07:47,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2022-07-21 09:07:47,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 4296 transitions. [2022-07-21 09:07:47,382 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6268787392382899 [2022-07-21 09:07:47,382 INFO L72 ComplementDD]: Start complementDD. Operand 77 states and 4296 transitions. [2022-07-21 09:07:47,382 INFO L73 IsDeterministic]: Start isDeterministic. Operand 77 states and 4296 transitions. [2022-07-21 09:07:47,382 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:07:47,382 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 77 states and 4296 transitions. [2022-07-21 09:07:47,385 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 78 states, 77 states have (on average 55.79220779220779) internal successors, (4296), 77 states have internal predecessors, (4296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:47,388 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 78 states, 78 states have (on average 89.0) internal successors, (6942), 78 states have internal predecessors, (6942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:47,389 INFO L81 ComplementDD]: Finished complementDD. Result has 78 states, 78 states have (on average 89.0) internal successors, (6942), 78 states have internal predecessors, (6942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:47,389 INFO L186 Difference]: Start difference. First operand has 860 places, 1424 transitions, 45757 flow. Second operand 77 states and 4296 transitions. [2022-07-21 09:07:47,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 919 places, 1633 transitions, 55107 flow [2022-07-21 09:07:49,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 895 places, 1633 transitions, 54294 flow, removed 121 selfloop flow, removed 24 redundant places. [2022-07-21 09:07:49,238 INFO L242 Difference]: Finished difference. Result has 911 places, 1514 transitions, 51392 flow [2022-07-21 09:07:49,240 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=45107, PETRI_DIFFERENCE_MINUEND_PLACES=819, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1008, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=77, PETRI_FLOW=51392, PETRI_PLACES=911, PETRI_TRANSITIONS=1514} [2022-07-21 09:07:49,240 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 832 predicate places. [2022-07-21 09:07:49,240 INFO L495 AbstractCegarLoop]: Abstraction has has 911 places, 1514 transitions, 51392 flow [2022-07-21 09:07:49,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:49,241 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:07:49,241 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:07:49,258 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-21 09:07:49,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-07-21 09:07:49,458 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:07:49,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:07:49,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1145489427, now seen corresponding path program 21 times [2022-07-21 09:07:49,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:07:49,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298633669] [2022-07-21 09:07:49,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:07:49,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:07:49,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:07:49,725 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:07:49,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:07:49,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298633669] [2022-07-21 09:07:49,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298633669] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:07:49,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732287961] [2022-07-21 09:07:49,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 09:07:49,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:07:49,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:07:49,728 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:07:49,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-21 09:07:49,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-21 09:07:49,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:07:49,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-21 09:07:49,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:07:50,171 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:07:50,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:07:50,619 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:07:50,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732287961] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:07:50,619 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:07:50,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 45 [2022-07-21 09:07:50,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629076876] [2022-07-21 09:07:50,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:07:50,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-21 09:07:50,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:07:50,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-21 09:07:50,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1768, Unknown=0, NotChecked=0, Total=1980 [2022-07-21 09:07:50,622 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-07-21 09:07:50,623 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 911 places, 1514 transitions, 51392 flow. Second operand has 45 states, 45 states have (on average 53.62222222222222) internal successors, (2413), 45 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:50,623 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:07:50,623 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-07-21 09:07:50,623 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:07:57,343 INFO L129 PetriNetUnfolder]: 1516/5294 cut-off events. [2022-07-21 09:07:57,343 INFO L130 PetriNetUnfolder]: For 291069/291091 co-relation queries the response was YES. [2022-07-21 09:07:57,434 INFO L84 FinitePrefix]: Finished finitePrefix Result has 57200 conditions, 5294 events. 1516/5294 cut-off events. For 291069/291091 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 54830 event pairs, 93 based on Foata normal form. 15/5287 useless extension candidates. Maximal degree in co-relation 57016. Up to 808 conditions per place. [2022-07-21 09:07:57,467 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 616 selfloop transitions, 1139 changer transitions 13/1811 dead transitions. [2022-07-21 09:07:57,467 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 996 places, 1811 transitions, 62960 flow [2022-07-21 09:07:57,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-07-21 09:07:57,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-07-21 09:07:57,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 5231 transitions. [2022-07-21 09:07:57,470 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6319922677298538 [2022-07-21 09:07:57,470 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 5231 transitions. [2022-07-21 09:07:57,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 5231 transitions. [2022-07-21 09:07:57,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:07:57,471 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 5231 transitions. [2022-07-21 09:07:57,475 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 56.24731182795699) internal successors, (5231), 93 states have internal predecessors, (5231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:57,479 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 89.0) internal successors, (8366), 94 states have internal predecessors, (8366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:57,479 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 89.0) internal successors, (8366), 94 states have internal predecessors, (8366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:57,479 INFO L186 Difference]: Start difference. First operand has 911 places, 1514 transitions, 51392 flow. Second operand 93 states and 5231 transitions. [2022-07-21 09:07:57,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 996 places, 1811 transitions, 62960 flow [2022-07-21 09:07:59,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 961 places, 1811 transitions, 61411 flow, removed 341 selfloop flow, removed 35 redundant places. [2022-07-21 09:07:59,718 INFO L242 Difference]: Finished difference. Result has 988 places, 1630 transitions, 57509 flow [2022-07-21 09:07:59,719 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=50170, PETRI_DIFFERENCE_MINUEND_PLACES=869, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1030, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=57509, PETRI_PLACES=988, PETRI_TRANSITIONS=1630} [2022-07-21 09:07:59,720 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 909 predicate places. [2022-07-21 09:07:59,720 INFO L495 AbstractCegarLoop]: Abstraction has has 988 places, 1630 transitions, 57509 flow [2022-07-21 09:07:59,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 53.62222222222222) internal successors, (2413), 45 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:59,721 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:07:59,721 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:07:59,740 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-07-21 09:07:59,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-07-21 09:07:59,935 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:07:59,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:07:59,936 INFO L85 PathProgramCache]: Analyzing trace with hash 491254805, now seen corresponding path program 22 times [2022-07-21 09:07:59,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:07:59,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243925005] [2022-07-21 09:07:59,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:07:59,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:07:59,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:08:00,195 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:08:00,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:08:00,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243925005] [2022-07-21 09:08:00,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243925005] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:08:00,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711480073] [2022-07-21 09:08:00,195 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 09:08:00,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:08:00,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:08:00,197 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:08:00,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-21 09:08:00,248 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 09:08:00,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:08:00,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-21 09:08:00,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:08:00,693 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:08:00,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:08:01,146 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:08:01,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711480073] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:08:01,146 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:08:01,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 45 [2022-07-21 09:08:01,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228578263] [2022-07-21 09:08:01,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:08:01,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-21 09:08:01,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:08:01,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-21 09:08:01,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1773, Unknown=0, NotChecked=0, Total=1980 [2022-07-21 09:08:01,149 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-07-21 09:08:01,150 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 988 places, 1630 transitions, 57509 flow. Second operand has 45 states, 45 states have (on average 53.644444444444446) internal successors, (2414), 45 states have internal predecessors, (2414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:08:01,150 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:08:01,150 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-07-21 09:08:01,150 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:08:07,708 INFO L129 PetriNetUnfolder]: 1679/5782 cut-off events. [2022-07-21 09:08:07,708 INFO L130 PetriNetUnfolder]: For 402967/402980 co-relation queries the response was YES. [2022-07-21 09:08:07,792 INFO L84 FinitePrefix]: Finished finitePrefix Result has 68145 conditions, 5782 events. 1679/5782 cut-off events. For 402967/402980 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 60759 event pairs, 100 based on Foata normal form. 12/5768 useless extension candidates. Maximal degree in co-relation 67942. Up to 943 conditions per place. [2022-07-21 09:08:07,826 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 541 selfloop transitions, 1341 changer transitions 12/1937 dead transitions. [2022-07-21 09:08:07,826 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1088 places, 1937 transitions, 71643 flow [2022-07-21 09:08:07,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-07-21 09:08:07,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2022-07-21 09:08:07,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 5929 transitions. [2022-07-21 09:08:07,829 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6225979208232699 [2022-07-21 09:08:07,829 INFO L72 ComplementDD]: Start complementDD. Operand 107 states and 5929 transitions. [2022-07-21 09:08:07,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 107 states and 5929 transitions. [2022-07-21 09:08:07,830 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:08:07,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 107 states and 5929 transitions. [2022-07-21 09:08:07,834 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 108 states, 107 states have (on average 55.41121495327103) internal successors, (5929), 107 states have internal predecessors, (5929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:08:07,838 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 108 states, 108 states have (on average 89.0) internal successors, (9612), 108 states have internal predecessors, (9612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:08:07,838 INFO L81 ComplementDD]: Finished complementDD. Result has 108 states, 108 states have (on average 89.0) internal successors, (9612), 108 states have internal predecessors, (9612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:08:07,838 INFO L186 Difference]: Start difference. First operand has 988 places, 1630 transitions, 57509 flow. Second operand 107 states and 5929 transitions. [2022-07-21 09:08:07,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1088 places, 1937 transitions, 71643 flow [2022-07-21 09:08:10,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1028 places, 1937 transitions, 68842 flow, removed 361 selfloop flow, removed 60 redundant places. [2022-07-21 09:08:10,494 INFO L242 Difference]: Finished difference. Result has 1051 places, 1813 transitions, 65986 flow [2022-07-21 09:08:10,495 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=54993, PETRI_DIFFERENCE_MINUEND_PLACES=922, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1630, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=107, PETRI_FLOW=65986, PETRI_PLACES=1051, PETRI_TRANSITIONS=1813} [2022-07-21 09:08:10,497 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 972 predicate places. [2022-07-21 09:08:10,497 INFO L495 AbstractCegarLoop]: Abstraction has has 1051 places, 1813 transitions, 65986 flow [2022-07-21 09:08:10,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 53.644444444444446) internal successors, (2414), 45 states have internal predecessors, (2414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:08:10,497 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:08:10,497 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:08:10,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-21 09:08:10,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:08:10,710 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:08:10,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:08:10,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1756563129, now seen corresponding path program 23 times [2022-07-21 09:08:10,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:08:10,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384532593] [2022-07-21 09:08:10,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:08:10,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:08:10,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:08:11,008 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:08:11,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:08:11,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384532593] [2022-07-21 09:08:11,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384532593] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:08:11,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202397561] [2022-07-21 09:08:11,008 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 09:08:11,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:08:11,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:08:11,009 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:08:11,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-21 09:08:11,086 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-21 09:08:11,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:08:11,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-21 09:08:11,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:08:11,518 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:08:11,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:08:11,966 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:08:11,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202397561] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:08:11,966 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:08:11,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 45 [2022-07-21 09:08:11,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796995502] [2022-07-21 09:08:11,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:08:11,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-21 09:08:11,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:08:11,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-21 09:08:11,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1781, Unknown=0, NotChecked=0, Total=1980 [2022-07-21 09:08:11,968 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-07-21 09:08:11,970 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1051 places, 1813 transitions, 65986 flow. Second operand has 45 states, 45 states have (on average 53.62222222222222) internal successors, (2413), 45 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:08:11,970 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:08:11,970 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-07-21 09:08:11,970 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:08:20,241 INFO L129 PetriNetUnfolder]: 1852/6339 cut-off events. [2022-07-21 09:08:20,242 INFO L130 PetriNetUnfolder]: For 460600/460613 co-relation queries the response was YES. [2022-07-21 09:08:20,337 INFO L84 FinitePrefix]: Finished finitePrefix Result has 76675 conditions, 6339 events. 1852/6339 cut-off events. For 460600/460613 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 67323 event pairs, 93 based on Foata normal form. 12/6332 useless extension candidates. Maximal degree in co-relation 76465. Up to 1094 conditions per place. [2022-07-21 09:08:20,379 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 560 selfloop transitions, 1583 changer transitions 12/2198 dead transitions. [2022-07-21 09:08:20,379 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1184 places, 2198 transitions, 82820 flow [2022-07-21 09:08:20,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2022-07-21 09:08:20,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2022-07-21 09:08:20,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 7779 transitions. [2022-07-21 09:08:20,383 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6243178170144462 [2022-07-21 09:08:20,383 INFO L72 ComplementDD]: Start complementDD. Operand 140 states and 7779 transitions. [2022-07-21 09:08:20,383 INFO L73 IsDeterministic]: Start isDeterministic. Operand 140 states and 7779 transitions. [2022-07-21 09:08:20,384 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:08:20,384 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 140 states and 7779 transitions. [2022-07-21 09:08:20,389 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 141 states, 140 states have (on average 55.56428571428572) internal successors, (7779), 140 states have internal predecessors, (7779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:08:20,396 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 141 states, 141 states have (on average 89.0) internal successors, (12549), 141 states have internal predecessors, (12549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:08:20,397 INFO L81 ComplementDD]: Finished complementDD. Result has 141 states, 141 states have (on average 89.0) internal successors, (12549), 141 states have internal predecessors, (12549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:08:20,397 INFO L186 Difference]: Start difference. First operand has 1051 places, 1813 transitions, 65986 flow. Second operand 140 states and 7779 transitions. [2022-07-21 09:08:20,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1184 places, 2198 transitions, 82820 flow [2022-07-21 09:08:23,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1147 places, 2198 transitions, 79762 flow, removed 210 selfloop flow, removed 37 redundant places. [2022-07-21 09:08:23,835 INFO L242 Difference]: Finished difference. Result has 1175 places, 2013 transitions, 75496 flow [2022-07-21 09:08:23,836 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=63359, PETRI_DIFFERENCE_MINUEND_PLACES=1008, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1813, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1387, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=140, PETRI_FLOW=75496, PETRI_PLACES=1175, PETRI_TRANSITIONS=2013} [2022-07-21 09:08:23,837 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 1096 predicate places. [2022-07-21 09:08:23,837 INFO L495 AbstractCegarLoop]: Abstraction has has 1175 places, 2013 transitions, 75496 flow [2022-07-21 09:08:23,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 53.62222222222222) internal successors, (2413), 45 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:08:23,837 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:08:23,838 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:08:23,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-21 09:08:24,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:08:24,039 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:08:24,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:08:24,040 INFO L85 PathProgramCache]: Analyzing trace with hash -584407551, now seen corresponding path program 24 times [2022-07-21 09:08:24,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:08:24,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335159197] [2022-07-21 09:08:24,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:08:24,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:08:24,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:08:24,292 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:08:24,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:08:24,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335159197] [2022-07-21 09:08:24,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335159197] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:08:24,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818587911] [2022-07-21 09:08:24,293 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 09:08:24,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:08:24,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:08:24,295 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:08:24,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-21 09:08:24,342 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-07-21 09:08:24,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:08:24,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-21 09:08:24,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:08:24,799 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:08:24,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:08:25,351 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:08:25,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818587911] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:08:25,352 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:08:25,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 46 [2022-07-21 09:08:25,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406390675] [2022-07-21 09:08:25,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:08:25,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-21 09:08:25,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:08:25,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-21 09:08:25,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1856, Unknown=0, NotChecked=0, Total=2070 [2022-07-21 09:08:25,356 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-07-21 09:08:25,357 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1175 places, 2013 transitions, 75496 flow. Second operand has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:08:25,357 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:08:25,357 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-07-21 09:08:25,357 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:08:40,931 INFO L129 PetriNetUnfolder]: 2052/7011 cut-off events. [2022-07-21 09:08:40,931 INFO L130 PetriNetUnfolder]: For 548595/548608 co-relation queries the response was YES. [2022-07-21 09:08:41,051 INFO L84 FinitePrefix]: Finished finitePrefix Result has 86340 conditions, 7011 events. 2052/7011 cut-off events. For 548595/548608 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 75700 event pairs, 76 based on Foata normal form. 12/7008 useless extension candidates. Maximal degree in co-relation 86111. Up to 1196 conditions per place. [2022-07-21 09:08:41,097 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 502 selfloop transitions, 1974 changer transitions 13/2532 dead transitions. [2022-07-21 09:08:41,097 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1408 places, 2532 transitions, 95276 flow [2022-07-21 09:08:41,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 240 states. [2022-07-21 09:08:41,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2022-07-21 09:08:41,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 13314 transitions. [2022-07-21 09:08:41,104 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.623314606741573 [2022-07-21 09:08:41,104 INFO L72 ComplementDD]: Start complementDD. Operand 240 states and 13314 transitions. [2022-07-21 09:08:41,104 INFO L73 IsDeterministic]: Start isDeterministic. Operand 240 states and 13314 transitions. [2022-07-21 09:08:41,106 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:08:41,106 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 240 states and 13314 transitions. [2022-07-21 09:08:41,114 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 241 states, 240 states have (on average 55.475) internal successors, (13314), 240 states have internal predecessors, (13314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:08:41,124 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 241 states, 241 states have (on average 89.0) internal successors, (21449), 241 states have internal predecessors, (21449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:08:41,126 INFO L81 ComplementDD]: Finished complementDD. Result has 241 states, 241 states have (on average 89.0) internal successors, (21449), 241 states have internal predecessors, (21449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:08:41,126 INFO L186 Difference]: Start difference. First operand has 1175 places, 2013 transitions, 75496 flow. Second operand 240 states and 13314 transitions. [2022-07-21 09:08:41,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1408 places, 2532 transitions, 95276 flow [2022-07-21 09:08:45,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1351 places, 2532 transitions, 93348 flow, removed 450 selfloop flow, removed 57 redundant places. [2022-07-21 09:08:45,376 INFO L242 Difference]: Finished difference. Result has 1384 places, 2276 transitions, 88743 flow [2022-07-21 09:08:45,377 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=73818, PETRI_DIFFERENCE_MINUEND_PLACES=1112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2013, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1724, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=240, PETRI_FLOW=88743, PETRI_PLACES=1384, PETRI_TRANSITIONS=2276} [2022-07-21 09:08:45,378 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 1305 predicate places. [2022-07-21 09:08:45,378 INFO L495 AbstractCegarLoop]: Abstraction has has 1384 places, 2276 transitions, 88743 flow [2022-07-21 09:08:45,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:08:45,378 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:08:45,378 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:08:45,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-21 09:08:45,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-07-21 09:08:45,587 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:08:45,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:08:45,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1538828033, now seen corresponding path program 25 times [2022-07-21 09:08:45,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:08:45,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443721651] [2022-07-21 09:08:45,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:08:45,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:08:45,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:08:45,874 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:08:45,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:08:45,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443721651] [2022-07-21 09:08:45,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443721651] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:08:45,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475805343] [2022-07-21 09:08:45,874 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 09:08:45,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:08:45,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:08:45,876 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:08:45,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-21 09:08:45,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:08:45,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-21 09:08:45,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:08:46,319 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:08:46,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:08:46,862 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:08:46,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475805343] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:08:46,862 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:08:46,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 45 [2022-07-21 09:08:46,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870274073] [2022-07-21 09:08:46,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:08:46,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-21 09:08:46,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:08:46,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-21 09:08:46,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1774, Unknown=0, NotChecked=0, Total=1980 [2022-07-21 09:08:46,864 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-07-21 09:08:46,865 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1384 places, 2276 transitions, 88743 flow. Second operand has 45 states, 45 states have (on average 53.62222222222222) internal successors, (2413), 45 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:08:46,865 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:08:46,865 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-07-21 09:08:46,866 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:08:56,585 INFO L129 PetriNetUnfolder]: 2269/7606 cut-off events. [2022-07-21 09:08:56,585 INFO L130 PetriNetUnfolder]: For 747642/747664 co-relation queries the response was YES. [2022-07-21 09:08:56,723 INFO L84 FinitePrefix]: Finished finitePrefix Result has 102545 conditions, 7606 events. 2269/7606 cut-off events. For 747642/747664 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 83009 event pairs, 141 based on Foata normal form. 14/7584 useless extension candidates. Maximal degree in co-relation 102292. Up to 1353 conditions per place. [2022-07-21 09:08:56,776 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 714 selfloop transitions, 1864 changer transitions 12/2633 dead transitions. [2022-07-21 09:08:56,776 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1499 places, 2633 transitions, 108467 flow [2022-07-21 09:08:56,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-07-21 09:08:56,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2022-07-21 09:08:56,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 6759 transitions. [2022-07-21 09:08:56,795 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6224903297108123 [2022-07-21 09:08:56,796 INFO L72 ComplementDD]: Start complementDD. Operand 122 states and 6759 transitions. [2022-07-21 09:08:56,796 INFO L73 IsDeterministic]: Start isDeterministic. Operand 122 states and 6759 transitions. [2022-07-21 09:08:56,797 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:08:56,797 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 122 states and 6759 transitions. [2022-07-21 09:08:56,801 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 123 states, 122 states have (on average 55.40163934426229) internal successors, (6759), 122 states have internal predecessors, (6759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:08:56,806 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 123 states, 123 states have (on average 89.0) internal successors, (10947), 123 states have internal predecessors, (10947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:08:56,806 INFO L81 ComplementDD]: Finished complementDD. Result has 123 states, 123 states have (on average 89.0) internal successors, (10947), 123 states have internal predecessors, (10947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:08:56,807 INFO L186 Difference]: Start difference. First operand has 1384 places, 2276 transitions, 88743 flow. Second operand 122 states and 6759 transitions. [2022-07-21 09:08:56,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1499 places, 2633 transitions, 108467 flow [2022-07-21 09:09:03,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1385 places, 2633 transitions, 105000 flow, removed 709 selfloop flow, removed 114 redundant places. [2022-07-21 09:09:03,666 INFO L242 Difference]: Finished difference. Result has 1408 places, 2518 transitions, 101963 flow [2022-07-21 09:09:03,668 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=85583, PETRI_DIFFERENCE_MINUEND_PLACES=1264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1628, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=604, PETRI_DIFFERENCE_SUBTRAHEND_STATES=122, PETRI_FLOW=101963, PETRI_PLACES=1408, PETRI_TRANSITIONS=2518} [2022-07-21 09:09:03,668 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 1329 predicate places. [2022-07-21 09:09:03,668 INFO L495 AbstractCegarLoop]: Abstraction has has 1408 places, 2518 transitions, 101963 flow [2022-07-21 09:09:03,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 53.62222222222222) internal successors, (2413), 45 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:09:03,669 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:09:03,669 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:09:03,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-21 09:09:03,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-07-21 09:09:03,885 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:09:03,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:09:03,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1411712641, now seen corresponding path program 26 times [2022-07-21 09:09:03,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:09:03,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026978110] [2022-07-21 09:09:03,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:09:03,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:09:03,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:09:04,165 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:09:04,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:09:04,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026978110] [2022-07-21 09:09:04,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026978110] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:09:04,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911139531] [2022-07-21 09:09:04,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 09:09:04,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:09:04,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:09:04,184 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:09:04,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-21 09:09:04,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 09:09:04,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:09:04,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-21 09:09:04,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:09:04,731 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:09:04,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:09:05,124 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:09:05,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911139531] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:09:05,125 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:09:05,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 45 [2022-07-21 09:09:05,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165478361] [2022-07-21 09:09:05,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:09:05,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-21 09:09:05,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:09:05,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-21 09:09:05,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1783, Unknown=0, NotChecked=0, Total=1980 [2022-07-21 09:09:05,128 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-07-21 09:09:05,130 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1408 places, 2518 transitions, 101963 flow. Second operand has 45 states, 45 states have (on average 53.62222222222222) internal successors, (2413), 45 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:09:05,130 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:09:05,130 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-07-21 09:09:05,130 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:09:17,891 INFO L129 PetriNetUnfolder]: 2505/8363 cut-off events. [2022-07-21 09:09:17,891 INFO L130 PetriNetUnfolder]: For 857566/857579 co-relation queries the response was YES. [2022-07-21 09:09:18,127 INFO L84 FinitePrefix]: Finished finitePrefix Result has 115720 conditions, 8363 events. 2505/8363 cut-off events. For 857566/857579 co-relation queries the response was YES. Maximal size of possible extension queue 581. Compared 92525 event pairs, 94 based on Foata normal form. 12/8368 useless extension candidates. Maximal degree in co-relation 115460. Up to 1475 conditions per place. [2022-07-21 09:09:18,186 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 677 selfloop transitions, 2270 changer transitions 12/3002 dead transitions. [2022-07-21 09:09:18,186 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1569 places, 3002 transitions, 125549 flow [2022-07-21 09:09:18,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2022-07-21 09:09:18,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2022-07-21 09:09:18,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 9368 transitions. [2022-07-21 09:09:18,191 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6265382557517389 [2022-07-21 09:09:18,191 INFO L72 ComplementDD]: Start complementDD. Operand 168 states and 9368 transitions. [2022-07-21 09:09:18,191 INFO L73 IsDeterministic]: Start isDeterministic. Operand 168 states and 9368 transitions. [2022-07-21 09:09:18,193 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:09:18,193 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 168 states and 9368 transitions. [2022-07-21 09:09:18,199 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 169 states, 168 states have (on average 55.76190476190476) internal successors, (9368), 168 states have internal predecessors, (9368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:09:18,205 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 169 states, 169 states have (on average 89.0) internal successors, (15041), 169 states have internal predecessors, (15041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:09:18,206 INFO L81 ComplementDD]: Finished complementDD. Result has 169 states, 169 states have (on average 89.0) internal successors, (15041), 169 states have internal predecessors, (15041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:09:18,206 INFO L186 Difference]: Start difference. First operand has 1408 places, 2518 transitions, 101963 flow. Second operand 168 states and 9368 transitions. [2022-07-21 09:09:18,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1569 places, 3002 transitions, 125549 flow [2022-07-21 09:09:25,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1522 places, 3002 transitions, 123241 flow, removed 289 selfloop flow, removed 47 redundant places. [2022-07-21 09:09:25,830 INFO L242 Difference]: Finished difference. Result has 1548 places, 2784 transitions, 117621 flow [2022-07-21 09:09:25,832 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=100080, PETRI_DIFFERENCE_MINUEND_PLACES=1355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2016, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=473, PETRI_DIFFERENCE_SUBTRAHEND_STATES=168, PETRI_FLOW=117621, PETRI_PLACES=1548, PETRI_TRANSITIONS=2784} [2022-07-21 09:09:25,833 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 1469 predicate places. [2022-07-21 09:09:25,833 INFO L495 AbstractCegarLoop]: Abstraction has has 1548 places, 2784 transitions, 117621 flow [2022-07-21 09:09:25,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 53.62222222222222) internal successors, (2413), 45 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:09:25,833 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:09:25,833 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:09:25,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-07-21 09:09:26,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:09:26,047 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:09:26,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:09:26,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1519795649, now seen corresponding path program 2 times [2022-07-21 09:09:26,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:09:26,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257005696] [2022-07-21 09:09:26,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:09:26,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:09:26,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:09:26,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:09:26,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:09:26,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257005696] [2022-07-21 09:09:26,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257005696] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:09:26,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786389335] [2022-07-21 09:09:26,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 09:09:26,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:09:26,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:09:26,237 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:09:26,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-21 09:09:26,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 09:09:26,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:09:26,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-21 09:09:26,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:09:26,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:09:26,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:09:27,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:09:27,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786389335] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:09:27,030 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:09:27,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 41 [2022-07-21 09:09:27,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093763562] [2022-07-21 09:09:27,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:09:27,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-21 09:09:27,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:09:27,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-21 09:09:27,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=1387, Unknown=0, NotChecked=0, Total=1640 [2022-07-21 09:09:27,034 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 89 [2022-07-21 09:09:27,045 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1548 places, 2784 transitions, 117621 flow. Second operand has 41 states, 41 states have (on average 52.75609756097561) internal successors, (2163), 41 states have internal predecessors, (2163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:09:27,046 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:09:27,046 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 89 [2022-07-21 09:09:27,046 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:09:37,474 INFO L129 PetriNetUnfolder]: 3075/9846 cut-off events. [2022-07-21 09:09:37,474 INFO L130 PetriNetUnfolder]: For 1101301/1101314 co-relation queries the response was YES. [2022-07-21 09:09:37,674 INFO L84 FinitePrefix]: Finished finitePrefix Result has 137498 conditions, 9846 events. 3075/9846 cut-off events. For 1101301/1101314 co-relation queries the response was YES. Maximal size of possible extension queue 727. Compared 110900 event pairs, 403 based on Foata normal form. 70/9888 useless extension candidates. Maximal degree in co-relation 137224. Up to 2747 conditions per place. [2022-07-21 09:09:37,846 INFO L132 encePairwiseOnDemand]: 70/89 looper letters, 1207 selfloop transitions, 1767 changer transitions 65/3080 dead transitions. [2022-07-21 09:09:37,846 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1599 places, 3080 transitions, 134368 flow [2022-07-21 09:09:37,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-07-21 09:09:37,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2022-07-21 09:09:37,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 3230 transitions. [2022-07-21 09:09:37,849 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.625726462611391 [2022-07-21 09:09:37,849 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 3230 transitions. [2022-07-21 09:09:37,849 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 3230 transitions. [2022-07-21 09:09:37,850 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:09:37,850 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 3230 transitions. [2022-07-21 09:09:37,852 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 55.689655172413794) internal successors, (3230), 58 states have internal predecessors, (3230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:09:37,855 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 89.0) internal successors, (5251), 59 states have internal predecessors, (5251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:09:37,855 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 89.0) internal successors, (5251), 59 states have internal predecessors, (5251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:09:37,855 INFO L186 Difference]: Start difference. First operand has 1548 places, 2784 transitions, 117621 flow. Second operand 58 states and 3230 transitions. [2022-07-21 09:09:37,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1599 places, 3080 transitions, 134368 flow [2022-07-21 09:09:49,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1534 places, 3080 transitions, 131329 flow, removed 443 selfloop flow, removed 65 redundant places. [2022-07-21 09:09:49,101 INFO L242 Difference]: Finished difference. Result has 1546 places, 2878 transitions, 125339 flow [2022-07-21 09:09:49,103 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=114102, PETRI_DIFFERENCE_MINUEND_PLACES=1477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2772, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1645, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1095, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=125339, PETRI_PLACES=1546, PETRI_TRANSITIONS=2878} [2022-07-21 09:09:49,104 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 1467 predicate places. [2022-07-21 09:09:49,104 INFO L495 AbstractCegarLoop]: Abstraction has has 1546 places, 2878 transitions, 125339 flow [2022-07-21 09:09:49,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 52.75609756097561) internal successors, (2163), 41 states have internal predecessors, (2163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:09:49,105 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:09:49,105 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:09:49,122 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-07-21 09:09:49,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:09:49,318 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:09:49,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:09:49,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1093495597, now seen corresponding path program 27 times [2022-07-21 09:09:49,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:09:49,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524547429] [2022-07-21 09:09:49,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:09:49,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:09:49,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:09:49,588 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:09:49,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:09:49,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524547429] [2022-07-21 09:09:49,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524547429] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:09:49,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739720692] [2022-07-21 09:09:49,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 09:09:49,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:09:49,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:09:49,590 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:09:49,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-21 09:09:49,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-21 09:09:49,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:09:49,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-21 09:09:49,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:09:50,077 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:09:50,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:09:50,557 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:09:50,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739720692] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:09:50,557 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:09:50,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 46 [2022-07-21 09:09:50,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441252454] [2022-07-21 09:09:50,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:09:50,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-21 09:09:50,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:09:50,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-21 09:09:50,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1859, Unknown=0, NotChecked=0, Total=2070 [2022-07-21 09:09:50,560 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-07-21 09:09:50,561 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1546 places, 2878 transitions, 125339 flow. Second operand has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:09:50,561 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:09:50,561 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-07-21 09:09:50,561 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:10:12,322 INFO L129 PetriNetUnfolder]: 2753/9273 cut-off events. [2022-07-21 09:10:12,322 INFO L130 PetriNetUnfolder]: For 1095559/1095572 co-relation queries the response was YES. [2022-07-21 09:10:12,506 INFO L84 FinitePrefix]: Finished finitePrefix Result has 135444 conditions, 9273 events. 2753/9273 cut-off events. For 1095559/1095572 co-relation queries the response was YES. Maximal size of possible extension queue 608. Compared 104659 event pairs, 87 based on Foata normal form. 13/9277 useless extension candidates. Maximal degree in co-relation 135166. Up to 1585 conditions per place. [2022-07-21 09:10:12,574 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 574 selfloop transitions, 2692 changer transitions 18/3327 dead transitions. [2022-07-21 09:10:12,574 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1791 places, 3327 transitions, 145264 flow [2022-07-21 09:10:12,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 261 states. [2022-07-21 09:10:12,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2022-07-21 09:10:12,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 14499 transitions. [2022-07-21 09:10:12,581 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6241766757070902 [2022-07-21 09:10:12,581 INFO L72 ComplementDD]: Start complementDD. Operand 261 states and 14499 transitions. [2022-07-21 09:10:12,581 INFO L73 IsDeterministic]: Start isDeterministic. Operand 261 states and 14499 transitions. [2022-07-21 09:10:12,583 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:10:12,583 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 261 states and 14499 transitions. [2022-07-21 09:10:12,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 262 states, 261 states have (on average 55.55172413793103) internal successors, (14499), 261 states have internal predecessors, (14499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:12,603 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 262 states, 262 states have (on average 89.0) internal successors, (23318), 262 states have internal predecessors, (23318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:12,605 INFO L81 ComplementDD]: Finished complementDD. Result has 262 states, 262 states have (on average 89.0) internal successors, (23318), 262 states have internal predecessors, (23318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:12,605 INFO L186 Difference]: Start difference. First operand has 1546 places, 2878 transitions, 125339 flow. Second operand 261 states and 14499 transitions. [2022-07-21 09:10:12,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1791 places, 3327 transitions, 145264 flow [2022-07-21 09:10:22,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1759 places, 3327 transitions, 144373 flow, removed 139 selfloop flow, removed 32 redundant places. [2022-07-21 09:10:22,708 INFO L242 Difference]: Finished difference. Result has 1789 places, 3042 transitions, 138328 flow [2022-07-21 09:10:22,710 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=124641, PETRI_DIFFERENCE_MINUEND_PLACES=1499, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2878, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2533, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=261, PETRI_FLOW=138328, PETRI_PLACES=1789, PETRI_TRANSITIONS=3042} [2022-07-21 09:10:22,711 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 1710 predicate places. [2022-07-21 09:10:22,711 INFO L495 AbstractCegarLoop]: Abstraction has has 1789 places, 3042 transitions, 138328 flow [2022-07-21 09:10:22,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:22,712 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:10:22,712 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:10:22,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-07-21 09:10:22,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:10:22,921 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:10:22,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:10:22,922 INFO L85 PathProgramCache]: Analyzing trace with hash -724600069, now seen corresponding path program 3 times [2022-07-21 09:10:22,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:10:22,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938764621] [2022-07-21 09:10:22,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:10:22,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:10:22,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:10:23,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:10:23,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:10:23,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938764621] [2022-07-21 09:10:23,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938764621] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:10:23,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967061676] [2022-07-21 09:10:23,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 09:10:23,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:10:23,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:10:23,082 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:10:23,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-07-21 09:10:23,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-21 09:10:23,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:10:23,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-21 09:10:23,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:10:23,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:10:23,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:10:23,712 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:10:23,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967061676] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:10:23,713 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:10:23,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 38 [2022-07-21 09:10:23,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623380306] [2022-07-21 09:10:23,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:10:23,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-21 09:10:23,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:10:23,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-21 09:10:23,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1239, Unknown=0, NotChecked=0, Total=1406 [2022-07-21 09:10:23,715 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 89 [2022-07-21 09:10:23,716 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1789 places, 3042 transitions, 138328 flow. Second operand has 38 states, 38 states have (on average 52.60526315789474) internal successors, (1999), 38 states have internal predecessors, (1999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:23,716 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:10:23,716 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 89 [2022-07-21 09:10:23,716 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:10:36,031 INFO L129 PetriNetUnfolder]: 3177/10173 cut-off events. [2022-07-21 09:10:36,031 INFO L130 PetriNetUnfolder]: For 1368535/1368548 co-relation queries the response was YES. [2022-07-21 09:10:36,253 INFO L84 FinitePrefix]: Finished finitePrefix Result has 154715 conditions, 10173 events. 3177/10173 cut-off events. For 1368535/1368548 co-relation queries the response was YES. Maximal size of possible extension queue 667. Compared 114297 event pairs, 483 based on Foata normal form. 16/10145 useless extension candidates. Maximal degree in co-relation 154415. Up to 3314 conditions per place. [2022-07-21 09:10:36,331 INFO L132 encePairwiseOnDemand]: 70/89 looper letters, 1178 selfloop transitions, 1999 changer transitions 32/3250 dead transitions. [2022-07-21 09:10:36,332 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1860 places, 3250 transitions, 152512 flow [2022-07-21 09:10:36,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-07-21 09:10:36,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2022-07-21 09:10:36,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 4464 transitions. [2022-07-21 09:10:36,334 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6192259675405742 [2022-07-21 09:10:36,334 INFO L72 ComplementDD]: Start complementDD. Operand 81 states and 4464 transitions. [2022-07-21 09:10:36,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 81 states and 4464 transitions. [2022-07-21 09:10:36,335 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:10:36,335 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 81 states and 4464 transitions. [2022-07-21 09:10:36,337 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 82 states, 81 states have (on average 55.111111111111114) internal successors, (4464), 81 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:36,341 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 82 states, 82 states have (on average 89.0) internal successors, (7298), 82 states have internal predecessors, (7298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:36,341 INFO L81 ComplementDD]: Finished complementDD. Result has 82 states, 82 states have (on average 89.0) internal successors, (7298), 82 states have internal predecessors, (7298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:36,341 INFO L186 Difference]: Start difference. First operand has 1789 places, 3042 transitions, 138328 flow. Second operand 81 states and 4464 transitions. [2022-07-21 09:10:36,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1860 places, 3250 transitions, 152512 flow